A judge on Wednesday released court documents, including search warrant affidavits.
In them, investigators say 22-year-old Brittany Killgore apparently didn't know about the sexual lifestyle of Marine Staff Sgt. Louis Perez when she accepted his invitation to a dinner cruise on April 13.
Investigators say they found an apparent "sex dungeon" along with whips, knives and sex toys at the Fallbrook home where Perez is accused of strangling Killgore.
The Camp Pendleton Marine and two women, Dorothy Maraglino and Jessica Lynn Lopez, have pleaded not guilty to murder.
Killgore had filed for divorce three days earlier from her husband, who was in Afghanistan.