Police say the boy's father returned home to find him in the tub. WEST PHILADELPHIA - A mother has been charged in the death of her 5-year-old son who was found unresponsive in the bathroom of a West Philadelphia apartment, police saidJennifer Joseph, 40, is charged with murder and child endangerment in the death of 5-year-old Devon Joseph, according to court documents.Police said the defendant's husband told officers he came home shortly after 10 p.m.