DES MOINES, Iowa (AP) — U.S. Sen. Chuck Grassley says U.S. Attorney General Eric Holder will personally review the case of an Iowa man who drowned while in a Missouri state trooper’s custody.

Grassley said Friday he recently spoke with Holder about 20-year-old Brandon Ellingson’s drowning in late May on the Lake of the Ozarks. He says the attorney general told him he would personally review information about the case before providing it to staff attorneys at the U.S. Justice Department.

Witnesses say Ellingson had been detained on suspicion of boating while intoxicated. He was handcuffed when he slipped through a life jacket and drowned.

A jury ruled the death an accident during a coroner’s inquest in September. Ellingson’s family says there are unanswered questions about the circumstances of the death.