Former Stoughton police officer charged with killing Sandra Birchmore while she was pregnant  CBS BostonFormer Stoughton police detective faces litany of allegations in death of Sandra Birchmore. Here are 10 key details.  The Boston GlobeEx-officer accused of killing pregnant woman and staging her death as a suicide  The Washington PostEx-Stoughton police detective indicted in death of Sandra Birchmore  NBC BostonHere’s what evidence convinced federal investigators Sandra Birchmore was killed  MassLive.com