In Maryland, the defense must present clear and convincing evidence to support the insanity claim. Most forms used in the District Court are contained in this index.FAST staff at Eastside and Hargrove will assist the petitioner in completing the petition. The petition must be filled out completely. Maryland, The state uses the Model Penal Code rule. The burden of proof is on the defendant. A defendant who intends to assert a defense of insanity at the time of the alleged offense must so notify an attorney for the government in writing. A defendant who intends to assert a defense of insanity at the time of the alleged offense must so notify an attorney for the government in writing. Attachments must be documents contained in the case record like exhibits, transcripts, pleadings, and orders. An informal brief can be handwritten or typed.