Devan Schreiner, a former USPS worker from Longmont, Colorado, was locked in a turbulent custody battle with her ex-boyfriend, postal carrier Jason Schaefer, the father of their young son. Their relationship had soured after years of conflict, and shortly before the murder she was fired from the post office following an undisclosed “incident.” Prosecutors said Schreiner became enraged when Jason sought increased custody, and on October 13, 2021, she ambushed him on his mail route, shooting him as he sat in his postal truck.