Prosecutors say Jerry Boylan was negligent when he failed to institute a roving night watch or conduct proper fire drills aboard the Conception before it caught fire in 2019, killing 34. He has pleaded not guilty.
ATF investigators conducted a series of burn tests on a full-scale mock-up of the middle deck of the dive boat and concluded the deadly blaze began in a Rubbermaid garbage bin beneath the stairs of the main deck.