Suspected Serial Killer charged with the murder of 12 elderly women in Texas A Dallas, TX man previously arrested in the death of an 81-year-old woman has been charged with killing at least 11 more elderly women whose jewelry and other valuables he stole, authorities said Thursday. Billy Chemirmir, 46, posed as a caregiver for women across the Metroplex before killing and robbing them, according to police and court documents. As of Tuesday, Chemirmir was accused of killing 12 elderly…