Yes. Grounds for summoning an expert arise when a special knowledge is required in order to establish the circumstances significant for the conclusion of the case. These are circumstances that exceed a regular knowledge of the authority conducting the proceedings. A level of knowledge of an educated person having a relevant life experience may make a reference measure in this respect. Not only a Court-Appointed Expert, but also any person known to have a relevant knowledge in a certain field, can be appointed to act as an expert. Regardless the possibility and the necessity of appointing experts in criminal proceedings, if carrying out an inspection, an experiment, an expert evaluation, a seizure of objects, or a search require technical operations, in particular measuring, counting, photographing or preserving traces, then professionals may be summoned to participate in them.