PHILADELPHIA : Friends and classmates place flowers and candles at a memorial before a vigil for Salvatore DiNubile in Philadelphia, Wednesday, Oct. 25, 2017. An argument between teenagers ended up with Caleer Miller and DiNubile, both 16, lying on the ground after taking shots in their chests on Tuesday. Police don’t know what the disagreement was about but they said the boys were pronounced dead shortly after 9 p.m. (AP/PTI)