A child is to be treated in conformity with his age and maturity. In pre-trial investigation a suspect under eighteen shall not be questioned without a witness to the procedure unless he is assisted by a counsel or statutory representative. A child to be examined in court as a witness may be assigned a support-person. Usually the court, not the parties, conduct the examination. The parties may pose questions to him either through the judge or directly. If the person is under fifteen, his guardian, trustee, or other statutory representative may be present at the hearing. The pre-trial interrogation of a person under eighteen should always be recorded in sound or video format.
Before the interview in pre-trial investigation a suspect is informed of his procedural status and of the offence of which he is suspected. At the request of the suspect a third person acting as a witness shall be summoned to be present during the interview. In court proceedings, after the opening statements, a detailed discussion, including the taking of testimony, follows and the proceedings culminate in closing remarks by the parties. A person not speaking Finnish or Swedish has a right to an interpreter free of charge.
A person other than the suspect may not be obliged to remain at the police station for more than six hours at a time. In pre-trial investigation a third person acting as a hearing witness shall be present during the hearing. If the interview cannot be delayed without endangering the investigation, the interview may be conducted without a hearing witness.
In court the witness shall not refer to a written statement. He may, however, use notes as a memory aid. A person not speaking Finnish or Swedish has a right to an interpreter free of charge. If so requested, a Finnish prosecutor can be present at the court or/and present the questions to the person to be heard.