SAN DIEGO -- Investigators claim that a Marine's wife was killed after refusing to take part in sadomasochistic sex at a northern San Diego County home.

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.

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  • Brittany Dawn Killgore

    This image provided by the San Diego County Sheriff's Department shows Brittany Dawn Killgore who was reported missing Saturday, April 14, 2012. Killgore, 22, was last seen on Friday and her cellphone was found Saturday in San Diego's Gaslamp District. Sheriff's deputies in San Diego County are searching for a Kilgore, and say it is likely foul play is involved. (AP Photo/San Diego County Sheriff's Department)

  • Brittany Killgore

  • Brittany Killgore

  • Brittany Killgore

  • Jessica Lynn Lopez, right, is led out of court by a bailiff after her arraignment Thursday, April 19, 2012, in Vista, Calif. Lopez, 25, could face a maximum sentence of life in prison if convicted of killing 22-year-old Brittany Dawn Killgore, whose body was found April 17th in brush near a Southern California lake. (AP Photo/Gregory Bull)

  • Brittany Killgore

  • Brittany Killgore's lived near the Camp Pendleton Marine compound in California. Her husband was deployed in Afghanistan at the time of her murder.

  • San Diego County District Attorney Bonnie Dumanis speaks at a news conference Thursday, April 19, 2012, in San Diego. Authorities have determined that a body found near a Southern California lake is that of Brittany Dawn Killgore, a Marine's wife whose disappearance has led to the arrest of another woman on suspicion of murder. (AP Photo/Gregory Bull)

  • Jessica Lynn Lopez was arrested at a Ramada Inn near the San Diego airport after a would-be suicide note she wrote gruesomely detailed how she slammed Killgore's body into the stairs, shot her with a stun gun and strangled her with a rope.