FARMINGTON, Maine (AP)   A Maine man charged with killing his girlfriend is set to go on trial.

James Sweeney is using an insanity defense and has waived his right to a jury trial. That means a judge will be hearing evidence in the trial set to begin Monday.

Sweeney is charged with murder in the 2017 killing of 51-year-old Wendy Douglas.

Police say Sweeney killed Douglas while she slept in her Jay home. Investigators believe a baseball bat found in Douglas’ home was used in the killing.

Sweeney, who is deaf, turned himself in after the death and gave police a note that said, “I am going to jail cause I hurt my girlfriend.”