ANCHORAGE, Alaska — A Utah man killed his wife aboard an Alaska cruise ship and told an acquaintance who later walked into the couple’s blood-splattered room that he did it because she laughed at him, the FBI said in documents released Thursday.

Kenneth Manzanares of Santa Clara, Utah, was charged with murder after he was found with blood on his hands and clothes, and with blood spread throughout the cabin on the Princess Cruises ship Tuesday night, according to a criminal complaint by FBI Special Agent Michael L. Watson.

Kristy Manzanares, 39, had a severe head wound, but authorities have declined to release other details in the case, including how many people were traveling with the couple on the 3,400-passenger Emerald Princess that left Sunday from Seattle.

A man and other people went into the room before medical workers and security officers had arrived and saw the woman on the floor covered in blood, according to court documents.

The man asked Manzanares what happened, and the suspect said, “‘She would not stop laughing at me,’” according to the FBI complaint.

Manzanares then grabbed his wife’s body and tried to drag her to the balcony, but the man stopped him, Watson wrote. The name of the man was not included in the complaint.

A ship security officer handcuffed Manzanares, who was held in a nearby cabin, authorities said.

While the FBI searched him, Manzanares said, “‘My life is over,’” the complaint states.

Manzanares, 39, participated in his first court appearance Thursday by teleconference from Juneau, where he is in custody.

Bail has not been set and a preliminary hearing was scheduled for Aug. 10.