Reconstruction of the crime (procedural experiment)

Glossary category

What is a reconstruction of the crime?

A reconstruction of the crime, also referred to as a procedural experiment, is an evidentiary activity carried out during criminal proceedings to verify circumstances relevant to a case. Its purpose is not to recreate an event for presentation purposes, but to test whether a particular course of events could have occurred in the manner described by a suspect, witness, injured party or other participant in the proceedings.

Under Article 211 of the Polish Code of Criminal Procedure, a procedural experiment may be conducted to verify circumstances important for resolving a case. Depending on the facts, the activity may involve carrying out an experiment or reconstructing events, including recreating the movements of individuals, checking visibility or audibility, testing the time needed to perform certain actions, or determining whether an object could have been moved, hidden, used or observed in a specific way.

A procedural experiment may be conducted by the authority conducting the proceedings, such as the prosecutor or the Police during preparatory proceedings, or the court during judicial proceedings. Its course is documented in an official record. Photographs, video recordings, sketches, measurements and expert observations may also be attached to the case file.


What does a procedural experiment involve?

The exact form of a reconstruction depends on the subject of the proceedings. In a case involving theft, the authorities may verify whether access to a building or secured area was possible in the claimed circumstances. In a violent crime case, the experiment may concern the position of participants, the sequence of events, lighting conditions or the possibility of hearing specific sounds.

A reconstruction may also be used to assess whether testimony is consistent with physical conditions. For example, it may help determine whether a witness could identify a person from a particular distance, whether a driver had sufficient visibility, or whether the alleged timing of an event was realistic.

Procedural experiments should be conducted under conditions that are as close as reasonably possible to those existing at the time of the event. However, a complete reconstruction is often impossible. Weather, lighting, the layout of the location, the condition of objects and the behaviour of participants may have changed. For this reason, the results of a reconstruction must be assessed together with other evidence, including witness statements, forensic opinions, documents, recordings and physical traces.


When can a reconstruction of the crime be important?

A procedural experiment may be particularly relevant where the case depends on practical questions rather than solely on conflicting accounts of events. It can be useful when the parties disagree about whether an event was physically possible, whether a person could have seen or heard something, or whether a specific version of events is compatible with the location and available evidence.

For a suspect or defendant, participation in a reconstruction may create important procedural issues. A person accused of a crime is not required to prove their innocence or provide evidence against themselves. The scope and manner of their involvement should therefore be assessed carefully, especially where participation could affect their procedural position or the interpretation of evidence.

The defence lawyer may request that a procedural experiment be conducted if it could confirm circumstances favourable to the client. A lawyer may also challenge the evidential value of a reconstruction where the conditions were materially different from those at the time of the event, the activity was incomplete, or the conclusions drawn by the authorities exceed what the experiment actually established.


Why is legal assistance important during a procedural experiment?

The outcome of a reconstruction may influence decisions on charges, pre-trial detention, the credibility of testimony and the final assessment of guilt. Although a procedural experiment does not automatically prove that a particular event occurred, it may strengthen or weaken a specific version of events.

Prompt consultation with a criminal lawyer can help identify whether the planned activity is justified, whether the rights of the participant are being respected and whether additional evidence should be secured. Early legal assistance may also help avoid procedural mistakes and unsupported conclusions.


Law firm support in matters involving a reconstruction of the crime may include:

  • assessing the legal basis and purpose of a planned procedural experiment;
  • providing legal assistance to suspects, defendants, injured parties and witnesses in connection with criminal proceedings;
  • preparing motions to conduct a reconstruction or other evidentiary activities;
  • reviewing official records, recordings and other documentation from the experiment;
  • challenging procedural irregularities and unreliable evidential conclusions;
  • developing a defence strategy based on the full body of evidence.


Need legal assistance regarding a reconstruction of the crime or another evidentiary activity in criminal proceedings? Contact us.


See also