NEW : Police descend on Pa. , Pennsylvania , after possible sighting of suspect . Killings break the calm in five small towns in Pennsylvania . CNN says suspect killed his ex-wife and five in-laws . Suspect identified as Bradley William Stone , 35 , of Pennsylvania , Pennsylvania .
NEW : Police descend on Doylestown , Pa. , after possible sighting of suspect . Killings break the calm in three small towns in Pennsylvania . DA says suspect killed his ex-wife and five in-laws . Suspect identified as Bradley William Stone , 35 , of Pennsburg , Pennsylvania .