The mother of a man who tried to launch a firework off the top of his head for July Fourth and was killed instantly said Monday she's advocating for stricter controls about who can use the explosives. Devon Staples, 22, and his friends had been drinking and setting off fireworks Saturday night in a backyard in Staples' eastern Maine hometown, Calais, when the accident happened with a reloadable fireworks mortar tube, police have said.