ST. LOUIS—A 10-year-old boy fatally shot his 12-year-old brother as the two played with a gun they found inside a St. Louis home, police said. The shooting happened Tuesday night in a north St. Louis neighborhood, KMOV-TV reported. Police said the boys were with a parent who was getting a haircut in the home when the older boy was shot in the face. Police said a woman was arrested Wednesday on a possible charge of endangering the welfare of a child, the St. Louis Post-Dispatch reported. The death follows a spate of shootings in St. Louis involving children handling guns. On Friday, two young cousins who were livestreaming from a St. Louis apartment died when one child fatally shot the other before killing herself in what family members have said was an accident. In February, a 12-year-old girl was wounded in an accidental self-inflicted shooting. St. Louis Metropolitan Police Maj. …