BOSTON — The Latest on the mystery surrounding a man who was rescued at sea after floating for a week on a life raft (all times local):

4:05 p.m.

A man rescued after spending a week at sea says he had nothing to do with his grandfather’s 2013 unsolved slaying and didn’t harm his missing mother.

Twenty-two-year-old Nathan Carman tells The Associated Press on Wednesday that the fishing boat he was in with his mother sank within a matter of minutes. Carman was rescued Sunday. His mother, Linda Carman, of Connecticut, is missing and presumed dead.

Carman told the AP by telephone that after water began pouring into his boat, he saw his mother in the cockpit. He said he grabbed survival gear, then looked back and she was gone.

Carman says he was like a son to his grandfather, who was slain in Connecticut. Police there say Carman had been a suspect, but was never charged.

1:40 p.m.

Police say a man who spent seven days at sea and was a suspect in his grandfather’s 2013 killing had violent episodes as a child.

A 2014 search warrant obtained Wednesday by The Associated Press says authorities investigating the killing of 87-year-old John Chakalos learned that 22-year-old Nathan Carman once held another child “hostage” with a knife.

The warrant led to the seizure of a shotgun, a pellet rifle, a rifle scope and ammunition in 2014 from Carman’s apartment.

It says Carman bought a rifle consistent with the one used to kill Chakalos and discarded his hard drive and GPS the morning of the killing.

Carman wasn’t charged.

He and his mother went out on a fishing boat this month. He says the boat sank. His mother is presumed dead.

10:50 a.m.

A police affidavit says surveillance video shows a mother and son arriving at a Rhode Island marina and preparing for their ill-fated fishing trip.

Twenty-two-year-old Nathan Carman, of Vernon, Vermont, was rescued in a life raft on Sunday. His 54-year-old mother, Linda Carman, of Middletown, Connecticut, is missing and presumed lost at sea. Nathan Carman says his boat took on water, and after he jumped into the raft, he couldn’t find his mother.

Ram Point Marina in South Kingstown, Rhode Island, is refusing to release the video to news outlets.

A woman who works at the marina tells The Associated Press that Nathan Carman rented a slip there for the season. It was his first season there.

9:50 a.m.

A warrant used to search the home of a 22-year-old man rescued in the Atlantic after floating for a week on a life raft shows authorities are looking for evidence of reckless endangerment.

Vermont authorities said police from South Kingstown, Rhode Island, searched Nathan Carman’s home in Vernon on Monday. Their search warrant indicates authorities think Carman was handling boat motor repairs himself and the vessel might not have been seaworthy.

That potentially could support an eventual charge of reckless endangerment. Carman hadn’t been charged as of Wednesday morning.

The warrant says the investigation into the disappearance of Carman’s mother, Linda, revealed her son “intended to go fishing further off-shore in a different location than what were his mother’s intentions and understanding.”

Linda Carman remains missing and presumed lost at sea.

9:15 a.m.

A 22-year-old man who was rescued after a being lost at sea for a week says he feels healthy despite what he called an emotional ordeal.

Nathan Carman said outside his Vernon, Vermont, home that he’s been through “a huge amount” emotionally, and he thanked the public for its “concern and prayers.”

Carman and his mother, Linda Carman, of Middletown, Connecticut, left Rhode Island on a fishing trip on Sept. 18. Nathan was rescued in a life raft off the Massachusetts coast on Sunday. His mother remains missing and is presumed dead.

Coast Guard officials interviewed Nathan Carman when he arrived in Boston on Tuesday. He told them he heard a ‘funny noise” in his boat’s engine compartment, saw water pouring in, then lost sight of his mother before he boarded the raft.