Jessica Heeringa was lone clerk at gas station . The court heard that the woman had been drinking and smoking marijuana before she went to a friend's house in the early hours of June 7. Station was reported empty at 11:15 p.m. `` Something very bad happened , '' police chief tells TV station .
Jessica Heeringa was lone clerk at gas station . She last served customer at 10:50 p.m. Friday , police say . Station was reported empty at 11:15 p.m. `` Something very bad happened , '' police chief tells TV station .