Yes. Formal request to a person qualified in a particular field to give an opinion on a non-legal, i.e. technical or scientific issue of a case, with the aim of verifying and establishing facts that may have escaped the attention of a non-specialist. In practice, frequent in the following fields: forensics, medicine, engineering sciences, ballistics, handwriting, etc. Scope: all types of criminal offences. See also psychiatric medical examination (A.41). No alternative measures.