Detention as a preventive measure means that a person is temporarily placed in custody during the course of criminal proceedings (during investigation and trial), although they have not yet been found guilty.
This is the strictest preventive measure.
What is the purpose of detention as a preventive measure?
The court applies it if there is a substantiated risk that the accused will:
Evade investigation or court;
Influence witnesses or the victim;
Destroy evidence;
Commit a new crime.
Important Details
Detention is not a punishment — it is a temporary measure;
It is imposed only by a court decision;
It is used when lighter measures (e.g. bail, personal surety, prohibition on leaving place of residence) are not sufficient;
It has a term, which may be extended only by the court.