US man allegedly murdered wife on cruise as she 'wouldn't stop laughing' at him

An American man is accused of murdering his wife during a cruise in Alaska because she would not stop laughing at him, US authorities said.

Personnel of the Emerald Princess went into the couple's cabin on Tuesday night (July 25) and found Kristy Manzanares, 39, dead, reported AFP via AsiaOne,

Kristy, a real estate agent, was covered in blood from a head wound and was pronounced dead 20 minutes later.

Her husband, Kenneth Manzanares, also 39, was arrested as a suspect and when searched for physical evidence by FBI agents, reportedly said, "My life is over." 

According to Daily Mail, a witness who had gotten to the cabin before the crew said Kenneth was found with blood on his hands as well as clothes and had also tried to throw the victim's body overboard.

He apparently also tried to jump off the ship once security personnel arrived at the scene.

Court documents added that 'blood was spread throughout' the room and was on 'multiple surfaces'.

When one of the witnesses asked him what had happened, Kenneth responded, "She would not stop laughing at me," according to the affidavit.

Emerald Princess was carrying 3,400 passengers and 1,100 crew members on a week-long cruise of the Alaskan panhandle that left on Sunday (July 23) from Seattle, Washington.

Passengers reported hearing screams on the night of the incident.

The couple from Utah was believed to have been celebrating their anniversary and had been accompanied by their children.