A 22-year-old East Houston man died Friday night while showing his younger sister how to take apart a gun, police said Saturday. "The initial information is that the male was showing his sister how to take apart a weapon and somehow the gun discharges," said Victor Senties, a Houston Police spokesman. Gregory Higgon, was taken to Ben Taub Hospital, where he died, Senties said. "This appears its going to be a tragic accident," Senties said, explaining that homicide investigators were still working the case.