U.S. prosecutors say a Utah man has been charged with murder in the death of his wife aboard an Alaska cruise.

Acting U.S. Attorney for Alaska Bryan Schroder said Thursday that Kenneth Manzanares was charged after his wife, Kristy, was found dead with a severe head wound in their cabin aboard the Princess Cruises ship.

An FBI criminal complaint says Kenneth Manzanares told an acquaintance who later walked into the blood-splattered room that he killed his wife because she wouldn't stop laughing at him.

Manzanares appeared in federal court by videoconference from Juneau late Thursday. The judge appointed a public defender.

He appeared to be crying at times before the start of the hearing and near the start, when U.S. Magistrate Judge Kevin F. McCoy began speaking. He dabbed at his eyes and nose with tissues.

Utah court records show that he has no criminal history.

The complaint by an FBI special agent says Kenneth Manzanares was found in the couple's room on the Emerald Princess on Tuesday night with blood on his hands and clothes and blood spread throughout the cabin.

Records say Manzanares grabbed his wife's body and dragged her to the balcony before the witness stopped him.

The FBI is investigating because the death occurred in U.S. waters.

The ship is in the midst of a weeklong trip that left Sunday from Seattle. It docked in Juneau on Wednesday morning.

The ship was carrying 3,400 passengers and 1,100 crew members.

The employer of Kristy Manzanares says she was a dedicated and loving mother who put her children ahead of her career in real estate. Summit Sotheby's International Realty says Kristy Manzanares was a trusted adviser and valued sales associate in the St. George, Utah, office.