A man wearing jeans and a gray hooded sweatshirt leaves his Brooklyn apartment on a Sunday night. About 10 minutes later, he fills a gasoline canister at a service station.
Ten minutes after that, he walks into a new L.G.B.T.Q. nightclub in the Bushwick section. Over the next few minutes, he splashes gas around a passageway and a lounge area as a bartender and another employee go about their business, unaware of what is happening nearby.
He throws a lit cigarette to the floor and walks off. When it fails to ignite, he tries again with what looks like a lighter.
This time, he succeeds, setting off an explosion and fire. The events, captured on security cameras and described in a federal criminal complaint, injured two employees and gutted the club, Rash.