Utah County authorities Monday identified a man who drowned in Utah Lake as Hoang Kim Trinh.
Deputies said Trinh, 36, of West Jordan, was boating with friends about 7 p.m. Sunday near the American Fork boat harbor when their boat broke down.
As others tried to fix it, Trinh, who was not wearing a life jacket, jumped into the water to swim. While swimming, deputies said he started to call for help. A friend grabbed two life jackets and jumped into the lake to help him.