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How Does an Attorney Independently Gather Evidence in a Criminal Case?

15.07.2026Reading time: 19 minAuthor: attorney Yuriy Arutyunov

When a criminal case is initiated against a person, the first impression is often this: the investigation has already gathered everything, the witnesses have been questioned, the examinations have been ordered. It seems that all that remains is to wait for the court's decision. In reality, the picture is different. Criminal proceedings are structured so that the defence has its own rights to gather information. A criminal defence attorney in Moscow is not obliged to wait until the investigator provides all the materials. He can act in parallel and build his own evidence base.

Many people still believe that defence counsel's role is limited to being present at interrogations, filing motions and speaking in court. Such an approach leaves the defence in a knowingly weak position. The modern work of an attorney begins earlier. After receiving the warrant, defence counsel studies the available materials, identifies gaps, looks for people whom the investigation has not interviewed, requests documents that have not made it into the case file and, if necessary, engages specialists.

In Moscow, criminal cases are initiated under a wide variety of offences — from traffic rule violations to crimes against the person and property. In each case, the outcome depends not only on what is written in the indictment but also on how fully the defence's position is presented. If the attorney limits himself to formal participation, the court sees only one version of events.

The difference between a passive and an active defence is fundamental. A passive defence comes down to familiarising oneself with the case file and making statements in court. An active defence means that the attorney himself goes to the scene of the event, talks to possible eyewitnesses, obtains written explanations, commissions specialist opinions and records the setting. These materials are then added to the case file and become part of the trial.

Clients often ask why legal assistance in a criminal case is needed if the investigator is obliged to establish the truth. The law does indeed place on the investigation the duty to examine the circumstances comprehensively. In practice, the investigator works in the interests of the prosecution. His task is to gather evidence sufficient to send the case to court. He is not obliged to look purposefully for what exonerates the suspect or improves their position. The attorney takes on this function.

The earlier defence counsel becomes involved in the case, the more opportunities there are to preserve traces, interview people and obtain documents. If the moment is missed, some of the information disappears: witnesses leave, camera footage is overwritten, documents are lost. That is why turning to an urgent attorney in Moscow makes practical sense precisely in the first days after prosecution begins.

An active stance changes the dynamics of the process. The investigator understands that his version will be tested. The court receives alternative materials. Witnesses see that there is someone ready to listen to their version. This creates a balance that would not otherwise exist. That is exactly why an attorney protecting your rights cannot limit himself to formal presence.

How a passive defence differs from an active one

A passive defence is always too late. The investigator has already formed the picture, the documents are already in the case file, the examinations have already been carried out. Defence counsel receives a ready-made package and tries to find contradictions in it. This is possible, but much harder than if he had gathered alternative information himself in advance.

In practice, cases in which the defence takes a passive stance more often end in a guilty verdict. The court sees one version. Even if the materials contain inconsistencies, one needs to know how to present them properly. Without one's own evidence, this is difficult.

Another problem is the lack of independent sources. The investigation interviews those it has chosen itself. The attorney can find other people. These people often give a completely different picture of events. Without their testimony, the court remains in the dark.

The attorney as a participant in proving the case and what powers he has

An attorney in criminal proceedings is not simply a representative of the client's interests. The law expressly classes him among the participants in proving the case. This means that he has the right to gather information that may later be recognised as evidence. This position is enshrined in criminal procedure legislation. Defence counsel may interview persons with their consent, request documents, engage specialists and obtain written opinions.

The powers arise from the moment of entering the case. The attorney presents the warrant and his certificate, gains access to the materials and takes part in investigative actions. But most importantly, he can act in parallel with the investigation. The investigator has no right to prohibit an attorney from gathering information if the actions are carried out within the law.

In practice, an attorney in Moscow uses these powers in different ways. In one case it is enough to send requests to organisations. In another it is necessary to find witnesses who did not come to the attention of the investigation. In a third, to obtain a specialist's opinion that casts doubt on the conclusions of the state examination.

The limits of the powers are clear. An attorney has no right to use coercion. He cannot force a person to give explanations. He has no right to record conversations secretly without the other person's consent. All actions must be open and voluntary. A breach of these rules makes the materials gathered inadmissible.

Defence counsel's rights in proving the case also include the right to present the information gathered to the court. The investigator is obliged to consider a motion to add it to the file. If he refuses, the defence may appeal the refusal. In court, the attorney again states the need to examine these materials. The court rarely ignores such requests, especially if the materials are relevant to the case.

Many citizens do not know that these rights exist. They believe that only the investigator can gather evidence. This is a misconception. The law has deliberately balanced the capabilities of the parties. Without such a balance, criminal proceedings would turn into one-sided prosecution.

An attorney's services in criminal proceedings include precisely this work of gathering information. A good attorney in Moscow is distinguished by a willingness to travel, interview, request and analyse, not merely to attend hearings.

Which documents confirm the attorney's powers

The main document is the warrant. In addition, the attorney presents his certificate. Without these papers, the investigative authorities are entitled not to admit him to participate. After entering the case, defence counsel acquires the right to familiarise himself with the materials, make extracts and take copies in accordance with the established procedure.

The client's consent deserves separate mention. The attorney performs all actions in the client's interests and with their knowledge. The client may limit the scope of the powers, but in practice this rarely happens. Usually the client is interested in the defence being as active as possible.

How the attorney gains access to the case materials

After the warrant is presented, the investigator is obliged to provide an opportunity to familiarise oneself with the available materials. The attorney makes extracts, takes copies and studies records and conclusions. On the basis of this analysis, he determines what information still needs to be gathered independently.

What exactly an attorney has the right to gather

The list of what an attorney may gather is fairly broad. The main condition is that everything must be obtained lawfully and with the consent of the people from whom the information is requested.

The first area is interviewing persons. The attorney may talk to anyone who may know something about the event. These may be eyewitnesses, neighbours, colleagues, relatives, drivers, passers-by. The conversation is conducted only on a voluntary basis. The person may refuse. If they agree, the attorney records the explanations in writing. These explanations are then added to the case file as other documents.

The second area is requesting documents. The attorney sends written requests to organisations, state bodies, medical institutions and property management companies. He may obtain copies of contracts, certificates, statements, extracts and camera recordings. Many organisations respond to such requests, because the law obliges them to do so in certain cases.

The third area is obtaining items and documents from private individuals. If a person has photographs, recordings of conversations, correspondence or diagrams, they may hand them over to the attorney. Defence counsel formalises this with a record of receipt. Such materials may also become evidence.

The fourth area is a specialist's opinion. The attorney may turn to a specialist in any field — medicine, engineering, economics, construction, trace evidence analysis. The specialist studies the materials and gives a written opinion. This opinion is not an expert examination in the procedural sense, but the court is obliged to examine it.

The fifth area is recording the setting. The attorney may go to the scene of the event, take photographs, draw a diagram, and describe the condition of objects, the location of cameras and traces. If the scene has not yet been altered, such materials are of great value.

  • Interviewing witnesses and eyewitnesses with their consent
  • Requesting and obtaining documents from organisations and institutions
  • Obtaining items and materials from private individuals
  • Engaging specialists and obtaining their opinions
  • Recording the setting at the scene of the event

The attorney carries out all these actions independently. He does not wait for the investigator's permission. He simply works within the rights granted by law. The materials gathered are then formalised and sent to the investigative body or the court.

In practice, it is precisely these actions that often change the picture of the case. In road traffic accident cases, the attorney finds camera recordings that the investigation did not request. In fraud cases, correspondence that shows the other side of the arrangements. In bodily harm cases, medical documents that cast doubt on the nature of the injuries.

The attorney gathers evidence not in order to achieve the desired result at any cost. He does so in order for the court to see the full picture. Without independent evidence in a criminal case, the defence remains at a disadvantage.

How an attorney interviews witnesses

Interviewing is one of the most frequently used tools. The attorney contacts the person, explains the purpose of the conversation and obtains their consent. Then the conversation takes place. Defence counsel asks questions and records the answers. The person signs the explanation. If the person does not want to sign, the attorney can still use the information, but its force will be less.

It is important that the interview does not turn into pressure. The attorney has no right to threaten, promise benefits or mislead. A breach of these rules makes the explanation inadmissible. The attorney's rights to gather evidence presuppose precisely the voluntary nature of obtaining information.

What information is usually recorded during an interview

During an interview, the attorney establishes what exactly the person saw or heard, at what time, in what circumstances, who else was present and what details they remember. The more specific the explanation, the greater its value for the case. The court views general phrases sceptically.

How the attorney uses the materials gathered in the case

Gathering information is only half the work. It must be properly formalised and presented. The attorney draws up a motion to add the materials to the file. In the motion he states exactly which materials he is submitting, why they matter and which circumstances they confirm or refute.

The investigator is obliged to consider the motion. He may grant it in full or in part, or refuse it. A refusal must be reasoned. If the refusal is unfounded, the defence appeals against it to the court or the prosecutor's office.

In court, the attorney again states the need to examine these materials. The court usually grants such requests, especially if the materials are relevant to the case. The judge examines them, questions the persons who gave explanations and hears the specialist.

The materials gathered by the attorney can be used in different ways. They can refute the prosecution's version. They can confirm an alibi. They can cast doubt on the conclusions of an examination. They can show that the investigation's inquiry was incomplete.

In practice there are cases where it was precisely the defence's materials that became the grounds for terminating the case or for an acquittal. This does not happen often, but it does happen. And it happens only when the attorney has really worked rather than limiting himself to formal participation.

The attorney presents evidence not only to the court. He may use it when appealing against the investigator's decisions, when filing motions for additional investigative actions and when discussing the position with the prosecutor. The stronger the defence's position, the more opportunities there are for a favourable outcome.

It is important to remember that the materials gathered have no predetermined force. The court assesses them together with all the other evidence. That is why the quality of their preparation matters. Explanations must be detailed. Documents must be certified. Specialist opinions must be reasoned.

The role of motions in working with evidence

A motion is the main instrument. Through it, the attorney secures the addition of materials to the file, the ordering of additional examinations and the questioning of new witnesses. Each motion must be well founded. The court and the investigation ignore empty requests.

An experienced attorney formulates motions in such a way that it is difficult to refuse them. He refers to specific provisions, points to gaps in the case materials and shows how new information may affect the outcome.

How materials are prepared for submission

Each document is accompanied by an explanatory note. Witnesses' explanations are signed. Specialist opinions contain information about the specialist's qualifications. Photographs and diagrams are described. Records of receipt of items are drawn up stating the date and those present. Without this, the court may refuse to admit them on formal grounds.

Why the investigator is often not interested in the defence's evidence

The investigator works within a particular system. His task is to gather evidence sufficient to send the case to court. He is oriented towards the prosecution. This is not personal hostility. It is the logic of the work.

When an attorney brings materials that cast doubt on the version, the investigator perceives them as an additional burden. He must either refute these materials or take them into account. Both require time and resources. That is why refusals to add materials to the file are common.

In addition, the investigator has already formed his view of the case. New information destroys this picture. Admitting that the original version was incomplete is psychologically difficult. That is why some of the defence's materials go unattended until the trial.

In court, the situation changes. The judge is not bound by the investigation's version. He is obliged to examine all the materials presented. That is exactly why the attorney's active work at the investigation stage often produces results at the court hearing.

There is another reason. The investigation works with limited resources. An investigator handles several cases at once. He does not have the opportunity to look for everything that might exonerate the suspect. He looks for what confirms guilt. The rest remains outside the scope.

That is why it is pointless to hope that the investigation itself will find exculpatory evidence. This must be done by the attorney. If he does not do it, the defence is left without its own evidence base. Evidence gathering by the defence is not a duplication of the investigation's work but a way of filling in what the investigation deliberately or of necessity leaves aside.

  • The investigator is oriented towards the prosecution, not towards establishing the full picture
  • New defence materials require additional work and checking
  • The investigation's resources are limited, and priority is given to evidence of guilt
  • Refusal to add materials to the file is often a formality

Understanding this logic helps one realise why one cannot rely solely on the investigation. Legal assistance in criminal cases includes precisely this active component.

Examples of effective evidence gathering by an attorney

Let us look at several typical situations in which independent evidence gathering changed the course of a case.

The first example is cases involving traffic rule violations. In such cases, there are often no video recordings from surveillance cameras. The investigation limits itself to a diagram and the testimony of the participants. The attorney goes to the scene, establishes where the cameras are located and requests recordings from property management companies or building owners. Sometimes it is possible to obtain a recording that completely changes the picture of the incident. You can find out more about defence in such cases on the page attorney services in traffic rule violation cases.

The second example is cases of causing bodily harm. The investigation relies on the conclusion of a forensic medical expert. The attorney engages an independent specialist who studies the same documents and medical records. The specialist points to alternative causes of the injuries, shortcomings in the initial examination and the possibility that the injuries were of a less serious nature. Such opinions often become the grounds for requalification. Information on defence under the bodily harm articles can be found here: attorney services under Article 111 and attorney services under Article 112.

The third example is fraud cases. Here documents and correspondence play a key role. The investigation often takes only those papers that support the prosecution's version. The attorney requests the full set of documents from the parties to the transaction, obtains messenger correspondence and finds witnesses to the negotiations. These materials show that the arrangements were different. More on defence in fraud cases: fraud and attorney services under Article 159.1.

The fourth example is battery cases. Often the conflict takes place without outside witnesses. The investigation relies on the victim's testimony. The attorney finds people who saw the preceding events, obtains recordings from the building entrance cameras and requests medical documents on the condition of both parties. This makes it possible to show the mutual nature of the conflict. Information on defence in such cases is available on the page battery.

In each of these examples, success depended on timely action. The earlier the attorney began gathering evidence, the greater the likelihood of obtaining the necessary information. The attorney and specialists work together: defence counsel formulates the questions, and the specialist gives reasoned answers.

What engaging a specialist achieves

A specialist's opinion is a powerful tool. It does not replace an expert examination, but it forces the court to pay attention to the shortcomings of the state examination. The specialist points to methodological errors, incompleteness of the study and alternative conclusions. The court is obliged to examine this. That is exactly why an attorney gathering evidence in Moscow often includes work with specialists in the defence plan.

In which fields specialists are most often engaged

Medicine, trace evidence analysis, economics, construction, linguistics, technical examinations. The choice depends on the offence and the nature of the disputed circumstances.

Limitations and risks in gathering evidence independently

An attorney has powers, but there are also strict limits. Crossing these limits makes the materials inadmissible and may lead to liability for the attorney himself.

The first limitation is voluntariness. No one may be forced to give explanations. If a person refuses, the attorney has no right to continue to apply pressure.

The second is the prohibition on deception and misleading. An attorney may not pose as a law enforcement officer, promise release from liability or conceal his role.

The third is the prohibition on secret recording. Recording a conversation without the other person's consent is in most cases unacceptable.

The fourth is the prohibition on influencing witnesses. Any attempts to influence the content of testimony are qualified as a crime.

There are also risks for the client. If the attorney acts carelessly, the materials gathered may be declared inadmissible. Then all the work turns out to have been in vain. That is why it is important for the attorney to have experience specifically in gathering evidence, not only in taking part in court hearings.

  • All interviews only with voluntary consent
  • Prohibition on deception and posing as someone else
  • Prohibition on secretly recording conversations
  • Prohibition on any influence on the content of testimony
  • The risk of materials being declared inadmissible if procedure is breached

An experienced attorney knows these limits and does not cross them. He works openly, documents everything and preserves the possibility of using the materials in court. How an attorney looks for evidence is a question not only of tactics but also of compliance with procedural rules.

Why without an attorney the defence almost always loses the battle of evidence

Without an attorney, the suspect or accused is left alone with the investigation. They do not have access to the tools that defence counsel has. They cannot officially request documents. They cannot engage specialists. They cannot formalise explanations in such a way that they have procedural force.

The investigation gathers only what is needed for the prosecution. The court sees only this picture. An alternative version is simply absent. In such conditions, an acquittal or termination of the case becomes a rarity.

Even if a person tries to gather something themselves, they often do so in breach of the rules. The materials turn out to be inadmissible. Time is lost. Opportunities are missed.

A round-the-clock attorney in Moscow can go out immediately after a detention. He records the setting before it is altered. He interviews people while they still remember the details. He requests documents before they are destroyed. Such promptness often decides the outcome of the case.

Criminal defence services include precisely this work. The client receives not only representation in court but also real gathering of independent evidence. Without this component, the defence remains a formality.

Practice shows that cases in which the attorney actively gathered evidence end significantly better. Termination, requalification, a suspended sentence instead of actual imprisonment — all of this is the result of work, not chance. A criminal defence attorney in Moscow who knows how to work with evidence changes the balance of power in the proceedings.

What happens if the attorney becomes involved late

The later an attorney enters a case, the fewer opportunities he has. Witnesses have already given testimony to the investigation and do not want to change it. The scene of the event has been altered. Documents have been lost. The experts' conclusions are already prepared. It is still possible to work, but the result will be more modest.

That is why seeking legal assistance in a criminal case must be timely. An urgent attorney in Moscow is not an advertising slogan but a real necessity in the first hours and days after prosecution begins.

Conclusion

Independent evidence gathering by an attorney is not an optional extra but a necessary part of the defence. The law gives defence counsel powers. The investigation does not use these powers to the full, because it works in the interests of the prosecution. Without an active stance by the attorney, the defence is left without its own evidence base.

Attorney Yuriy Arutyunov provides criminal defence services in Moscow. The work includes not only participation in investigative actions and court hearings but also real gathering of independent evidence. Interviews, requests for documents, specialist opinions, recording the setting — all of this is done within the law and in the client's interests.

If you are facing criminal prosecution, do not wait for the investigation to gather all the materials. Seek help. The earlier the work begins, the greater the chances of influencing the outcome of the case. Legal assistance in criminal cases must be active. Only then can you count on a fair result.