(1) On an investigation into a defendant's fitness to stand trial, a court (a) must hear any relevant admissible and probative evidence and representations put to the court by the prosecutor or the defendant; and(b) may call evidence on its own initiative; and(c) may require the defendant to undergo an examination by a psychiatrist or other appropriate expert and require the results of the examination to be reported to the court.(2) At an investigation, the defendant is entitled to be legally represented.