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What the Materials of a Criminal Case Are and Why They Need to Be Studied in Full

18.08.2026Reading time: 16 minAuthor: attorney Yuriy Arutyunov

The materials of a criminal case are the totality of all the documents gathered during the preliminary investigation. They include decisions to initiate the case, records of investigative actions, the testimony of the accused, the victim and witnesses, expert conclusions, physical evidence, diagrams, photo tables, the results of operational search activities and the final indictment. It is on this body of documents that the prosecution's position in court is built. That is why familiarisation with the materials of a criminal case is a mandatory and key stage of the defence.

Without a detailed study of the volumes, it is impossible to understand how well founded the investigation's conclusions are, which evidence is admissible and which was obtained in violation of the law. A criminal defence attorney in Moscow begins working with the materials immediately after receiving notice that the preliminary investigation has been completed. He does not limit himself to reading the indictment. Defence counsel analyses each document in turn, checks dates, compares testimony and verifies compliance with procedural rules.

Studying the volumes of the criminal case allows defence counsel to see the full picture. The investigation gathers materials according to a certain logic that suits the prosecution. The attorney reads the case differently — he looks for breaks in this logic, contradictions and gaps. That is exactly why familiarisation with the case after the investigation cannot be regarded as a formal procedure. It is analytical work, and the defence's subsequent position depends directly on its quality.

What documents make up the case materials and why each of them matters

The structure of a criminal case usually comprises several blocks. The first block consists of the documents on the initiation of the criminal case and its acceptance for proceedings. Here it is important to check whether there were lawful grounds for starting the investigation and whether the time limits were observed. The second block consists of records of investigative actions: inspections, searches, seizures, interrogations, confrontations, identification parades. Each such record must comply with the requirements of criminal procedure law. The third block consists of the conclusions of experts and specialists. The fourth consists of physical evidence and documents confirming its origin. The fifth consists of other materials, including correspondence, the results of wiretapping and video surveillance data.

The attorney analyses the case materials by precisely these blocks. He checks not only the content but also the form. If a record has been drawn up in breach of the rules, even important information contained in it may be declared inadmissible. If an examination was carried out without the accused being given the opportunity to put questions to the expert, this is also recorded. Such detailed work is possible only with full and consistent familiarisation.

Why a cursory look is not enough

Many accused persons limit themselves to reading the indictment and a few key records. This is far too little. The indictment is the investigation's final document, in which conclusions have already been drawn. To understand how well founded these conclusions are, it is necessary to go back to the primary materials. Only by comparing testimony at different stages, checking dates and verifying signatures is it possible to identify the real problems with the evidence base.

The attorney familiarises himself with the case systematically. He makes extracts with references to the case sheets, notes contradictions and records possible violations. Such preparation makes it possible to find the necessary fragments quickly in court and to refer to specific pages. Without prior work with the volumes, this is practically impossible.

Who the attorney is at the familiarisation stage and what rights he has

At the stage of familiarisation with the materials of a criminal case, the attorney acts as a professional analyst and defender of the accused's interests. He acts on the basis of a warrant and his attorney's certificate. The attorney's rights during familiarisation are enshrined in criminal procedure legislation and include the right to examine all the materials in full, make extracts, take copies and use technical means of recording.

Defence counsel may examine the materials repeatedly within the established time limit. If the case is large, the attorney moves for the familiarisation period to be extended. Such motions are granted when they are justified by the actual number of volumes and the need to study complex documents in detail, such as lengthy expert examinations.

An important part of the work is ensuring that the investigative body does not create artificial obstacles. If time is restricted, the taking of copies is refused or certain materials are not provided, the attorney records these facts and appeals against the investigator's actions. Legal assistance in criminal cases at this stage includes not only reading the documents but also protecting the very right to full familiarisation.

How defence counsel's rights are exercised in practice

In practice, the attorney agrees in advance a schedule for working with the materials. This makes it possible to plan time and work without haste. During familiarisation, defence counsel uses a voice recorder for spoken notes and a camera or scanner to copy individual sheets, unless this is prohibited by secrecy rules. All actions are carried out in the presence of an officer of the investigative body or in a specially designated room.

After finishing work on each volume, the attorney notes which documents have been studied. This helps ensure that no parts of the case are missed. A good attorney in Moscow always draws up an internal map of the materials: which evidence works for the prosecution, which contains weak points, which can be challenged on procedural grounds.

  • The right to full familiarisation with all volumes without exceptions
  • The right to make extracts and take copies at one's own expense
  • The right to use technical means of recording
  • The right to move for an extension of the familiarisation period
  • The right to appeal against any restrictions on access to the materials

How the familiarisation procedure works and how long it takes

The procedure begins from the moment the accused and defence counsel are notified that the preliminary investigation has been completed. The investigator sends the notification and invites them to attend for familiarisation. From this moment, a period begins to run that is set taking into account the volume of the materials. The law requires the period to be reasonable. In practice, in cases of small volume familiarisation takes from a few days to two weeks. In multi-volume cases the process may last a month or more.

The time needed for familiarisation with a criminal case depends not only on the number of volumes but also on the complexity of the documents they contain. If the case contains several examinations of fifty to one hundred pages each, more time is needed. If necessary, the attorney files a reasoned motion for an extension. The motion states specific circumstances: the number of volumes, the presence of complex specialist studies, the need to compare a large body of testimony.

During familiarisation, defence counsel works consistently. Usually one begins with the decision to initiate the criminal case, then studies the records of investigative actions in chronological order, after that moves on to the examinations and physical evidence, and only at the end reads the indictment. This order makes it possible to see how the investigation's position was formed and where breaks occurred.

The sequence of steps in studying the volumes

The first stage is a general acquaintance with the structure of the case. The attorney looks through the inventory of volumes and forms an idea of the scope. The second stage is a detailed reading of each document while taking notes. The third stage is comparing information from different sources. The fourth stage is identifying potentially inadmissible evidence. The fifth stage is forming a preliminary defence position on the basis of what has been found.

The attorney reads the case not as a continuous narrative but as a set of separate pieces of evidence, each of which must withstand scrutiny for admissibility, relevance and reliability. That is exactly why studying the volumes of a criminal case requires time and concentration. Haste at this stage almost always leads to important details being lost.

What happens after familiarisation is completed

After all the materials have been studied, the accused and defence counsel sign the familiarisation record. At this moment it is important to record all comments, if there were any. If the investigator restricted the time or did not provide certain documents, these facts are reflected in the record or set out in a separate statement. After the record is signed, the case is sent to court, and the opportunity to return to the materials in the same way no longer exists.

What exactly an experienced attorney looks at when studying the materials

When familiarising himself with the materials of a criminal case, an experienced defence counsel pays attention to several levels at once. The first level is the content of the evidence: what exactly the witnesses say, what conclusions the experts draw, what circumstances are recorded in the records. The second level is the procedural form: whether the requirements of the law were complied with when each piece of evidence was obtained. The third level is internal contradictions: whether the testimony of different persons is consistent, whether the expert's conclusions correspond to the source data, and whether there are discrepancies in dates and facts.

It is thanks to this multi-level approach that the attorney finds violations in the materials. He checks whether defence counsel was present during investigative actions when their participation was mandatory. He looks at whether rights were properly explained. He checks whether attesting witnesses were present during a search or seizure. He assesses whether the procedure for ordering an examination was followed.

Contradictions in testimony are of particular importance. If one and the same person gives substantially different information in different records, this is always recorded. If a witness's testimony appears in the case suddenly and without any explanation of how their identity became known, this also raises questions. The attorney analyses the case materials from the standpoint of the future judicial assessment of each piece of evidence.

Which violations occur most often

In practice, defence counsel regularly identify several typical categories of violations. They include defects in drawing up interrogation records, violations during searches and seizures, problems with ordering and conducting examinations, violations of the right to a defence during particular investigative actions, and errors in documenting physical evidence. Each such violation may become grounds for a motion declaring evidence inadmissible.

In addition, the attorney checks compliance with the time limits of the investigation and whether those time limits were calculated correctly. If particular actions were carried out outside the established periods without an extension, this is also noted. All points found are recorded with references to specific case sheets so that they can be quickly referred to in court later.

  • Checking that the accused's rights were respected in every investigative action
  • Identifying contradictions between testimony given at different stages
  • Analysing the admissibility of expert conclusions
  • Checking that physical evidence was documented correctly
  • Recording any departures from procedural form

Why a person without an attorney almost never notices important details

A person without legal training or experience of criminal cases reads the materials differently. They focus on exactly what they are being charged with and react emotionally to the content of the charge. At the same time, they hardly notice procedural violations. To them, a record is just text. To an attorney, a record is a document that must comply with strictly defined requirements.

In addition, the accused is under stress. They get tired, lose concentration and hurry to finish an unpleasant procedure. The attorney works professionally and systematically. He knows which fragments most often contain errors, which wording deserves particular attention and which documents require cross-checking. This difference in approach is what leads defence counsel to find what is missed not only by the investigation but also by the accused themselves.

An attorney's services in criminal proceedings at the familiarisation stage are aimed precisely at compensating for the client's lack of specialist knowledge and experience. Defence counsel takes on the analytical work and explains the results in plain language. As a result, the accused gains a real understanding of the strengths and weaknesses of the case.

Where the difference in approach lies

Independent familiarisation most often comes down to an attempt to understand the plot of the charge. A professional study of the volumes includes checking each piece of evidence for compliance with the law. The attorney looks not only at what is written but also at how it was obtained. He compares information from different sources and looks for inconsistencies. This level of analysis is not available to a person without special training.

That is why, even with the desire to work things out oneself, the result almost always turns out to be incomplete. Important details go unnoticed, and it is no longer possible to use them in court. A trial defence attorney subsequently relies precisely on the notes made at the familiarisation stage.

How the attorney uses what he finds in building the defence

Everything that defence counsel identifies when studying the materials is turned into specific procedural tools. These are motions to exclude inadmissible evidence, applications for additional judicial actions, questions for experts and witnesses, written positions of the defence, and complaints about violations committed during the investigation. Each such action is backed up by references to specific case sheets.

The defence strategy is formed on the basis of the results of familiarisation. If significant contradictions in testimony are discovered, the emphasis is placed on them. If inadmissible evidence is identified, the question of its exclusion is raised. If the investigation did not check obvious lines of inquiry, defence counsel draws the court's attention to this. Without prior detailed work with the materials, it is impossible to prepare such a position.

A criminal defence attorney, the cost of whose services takes into account the volume of analytical work required, always allows sufficient time for studying the volumes. This is not an optional extra but a mandatory part of a quality defence. The ability to act effectively at all subsequent stages of the proceedings depends on the thoroughness of this work.

From analysis of the materials to a position in court

After familiarisation is completed, defence counsel usually has a detailed conversation with the client. He explains which evidence poses the greatest threat, which has weaknesses and what prospects the various options for the position have. On the basis of this conversation, a decision is made on the further line of conduct in court. The client understands the logic of the defence and can take part in the proceedings in an informed way.

The attorney's further work at court hearings relies directly on the results of the study of the materials. Questions for witnesses are prepared in advance, taking into account the contradictions identified. Motions are written with precise references to case sheets. Speeches are built around the weak points discovered during familiarisation.

  • Preparing reasoned motions to exclude evidence
  • Drawing up a list of questions for examination in court
  • Preparing written positions and objections
  • Determining priority areas of work in the trial

Typical mistakes in independent familiarisation with the case materials

The most common mistake is trying to get through the procedure as quickly as possible. The person signs, barely reading the volumes, and considers that they have complied with the requirement of the law. As a result, important violations go unnoticed. The second mistake is the absence of any system of notes. Without notes and extracts, it is impossible later to find the necessary document quickly in a multi-volume case.

The third mistake is focusing only on the content of the charge while completely ignoring procedural form. The fourth is an emotional reaction to the texts instead of calm analysis. The fifth is declining the help of defence counsel in the hope of working things out alone. In practice, such economy almost always means that the opportunities for defence are not fully used.

An urgent attorney in Moscow is often brought in precisely when the client has already begun familiarising themselves with the materials independently and realised that they cannot cope. In such cases, defence counsel carries out a full analysis of the remaining volumes within a short time and prepares the necessary applications. However, it is much more effective to engage an attorney from the very beginning of the procedure.

Why these mistakes keep recurring

The reason lies in a lack of experience and specialist knowledge. A person does not know exactly what to look at, and so looks in the wrong place. They spend time on emotional reactions instead of systematically checking documents. A round-the-clock attorney in Moscow with a constant practice in criminal cases works according to a well-established methodology and does not make such slips.

When careful study of the materials changed the assessment of the evidence

In practice there are situations when the results of familiarisation became the turning point. Defence counsel discovered that a key examination had been carried out in violation of the accused's right to participate in ordering it. Or found that the record of an identification parade had been drawn up with gross departures from the established procedure. Or found significant contradictions in the victim's testimony that the investigation had ignored.

In such cases the attorney filed the relevant motions, and the court excluded the inadmissible evidence. Without this evidence, the prosecution's position was significantly weakened. Sometimes this led to a change in the qualification, sometimes to the need to return the case for the violations to be remedied, and sometimes to the question of terminating the prosecution being raised. It all began with a careful reading of the volumes.

The role of quality familiarisation is particularly noticeable in cases involving road traffic accidents, bodily harm and property offences. In such categories the evidence base is often voluminous and contains many technical details. An attorney who regularly handles such cases purposefully looks for typical weak points. You can find out more about the work in particular areas on the pages devoted to cases of driving while intoxicated, traffic rule violations, fraud and theft.

The importance of a systematic approach

Success in such situations is ensured not by a chance find but by a systematic approach to studying the materials. The attorney does not hope to "stumble upon" a violation. He purposefully checks each block of documents against criteria known in advance. That is exactly why the result is consistent.

Quality familiarisation as the basis of the entire subsequent defence

Familiarisation with the materials of a criminal case is the foundation on which all of defence counsel's subsequent work is built. The ability to file motions in good time, put questions correctly and speak effectively in the closing arguments depends on the thoroughness and depth of this work. Without a careful study of the volumes, the defence becomes superficial and merely reacts to the actions of the prosecution.

A criminal defence attorney in Moscow who takes the familiarisation stage seriously gives the client a real advantage. He finds what goes unnoticed in a quick look and turns what he has found into specific arguments. Criminal defence services include a mandatory full study of the materials precisely because without it there can be no talk of a professional defence.

If the investigation of a criminal case has already been completed and familiarisation lies ahead, it is most sensible to bring in defence counsel straight away. The earlier the attorney begins working with the volumes, the more opportunities will be used. This applies to cases of any complexity and any category, including cases involving grievous bodily harm.

The conclusion is simple: quality familiarisation with the materials of a criminal case is neither a formality nor a technical stage. It is the main analytical work on which the entire subsequent course of the defence depends. It is here that the attorney finds what the investigation often misses or underestimates, and it is here that the foundation is laid for effective work in court.