The next day, ATF agents interviewed Wheeler, who remained in custody at the hospital. Wheeler advised agents that he was injured when he mixed chemicals and they exploded. He also told the agents that he had previously made explosive devices and detonated them in his yard. A search warrant was executed at Wheeler’s residence in Glen Burnie by Anne Arundel County Police. Over the next two days law enforcement recovered, among other things: several improvised explosive devices, as well as the chemicals and explosive materials used to make them; drugs and drug paraphernalia; a Walther pistol, flare gun and signal flare launcher, along with a conversion kit to allow the launcher to shoot 12 gauge shot gun shells; and 12 gauge shot gun shells.