34-year-old Turner has been held in the Hancock County Jail since his arrest Friday at Acadia Hospital, a psychiatric facility in Bangor.
Turner is accused of killing 27-year-old Tad Howard. Authorities say Turner and Howard knew each other, but would not say what may have led to the shooting.
At today’s hearing, the victim’s parents and siblings were in the courtroom as Turner sat upright staring straight ahead. Turner didn’t speak, except to confer with his attorney, Jeffrey Toothaker.
Toothaker said his client is on a suicide watch at the jail.