Search crews recovered on Sunday the body of a Keller man who disappeared on Lake Grapevine after he jumped off a boat into the water Saturday.
Grapevine police said Daniel Patrick, 42, man jumped from a boat into the water to help a friend.
"They were headed to the ramp and decided to go for one last swim," Grapevine fire Chief Deputy Kent Short said. "One adult female jumped in without a life vest and became distressed. The victim jumped in and tried to help her. He got in trouble himself and went under and never resurfaced."
Police said life vests were thrown to the couple, and the woman was able to get back to the boat.
"He was able to get to the vest but not hold onto it, and that's when he went under," police Capt. John Luna said.
Diving crews searched for Patrick for several hours Saturday before calling off the search for the night. Crews resumed the search Sunday morning and found his body shortly after 9 a.m.
Police said Patrick; his 5-year-old son, Nathan; his girlfriend; and two friends were on the boat.
Search crews said the water where Patrick went under is about 12 feet to 15 feet deep.
"It's very vital that people understand if you're not familiar with the lake or the surroundings or the area where you are going to swim that wearing a life vest or knowing where you are going to be boating or some of the hazards is very important," Grapevine police Sgt. Kim Smith said.
Patrick's former wife and two of his friends said he loved the water and had enjoyed fishing since he was a child.
His death is the second drowning at Lake Grapevine since the start of the boating season.
"This is unusual for us to have two so quickly at the beginning of summer," Luna said.
NBC DFW's Ashanti Blaize contributed to this report.