The search for a Carlsbad surfer missing for weeks in Mexico has come to a deadly end.
Adam "Biff" D'esposito's sisters told NBC 7 he apparently drowned South of Baja Malibu near Rosarito.
"Since my brother is a big wave surfer, spending the better part of the last 20 years in Tahiti surfing some of the most dangerous waves in the world. It’s very hard for us and many of his friends to believe he would just drown. It seems like there has to be some more to the story that led him to that point,” his youngest sister Mary said
The 39-year-old father went to Mexico Sept. 2 for a surfing vacation and to see his dad. He borrowed his dad's car Sept. 6 and never returned.
Two days later, a surf shop owner said he saw Adam shoeless and shirtless, acting agitated, like someone was following him.
Adam's sisters say he'd recently been diagnosed with bipolar disorder.
Despite authorities saying there's no foul play-- his family is keeping their investigation open.
"With various sightings, the condition he was in, the paranoia, the fear he had, I feel we owe it to him to put together that timeline. And right now the timeline doesn’t make sense," said sister Briana.
Adam’s sister says Mexican authorities found him dead, without identification on Sunday, Sept. 9, but didn’t notify them until this Tuesday, more than two weeks later, despite their contact with multiple U.S. and Mexican agencies amid the search for Adam.
The family has set up a Gofundme page to help support Adam’s 6-year-old daughter.