. >> the other was charles oswalt.oo, said the relationship with margie was over. >> he was very much in love with his wife. oftentimes spoke about what they did on weekends and things like that. he was a type of police officer that other police officers i would say would try to emulate. >> lieutenant oswalt furnished a police report indicating he had been on duty that night on a drug investigation. >> we had no fingerprints. we had no weapon. we had to explore the other possibilities, and those possibilities were really going to come from her. >> margie coffey was last seen alive at this diner, sitting in a booth with her school books open, studying for a class. detective david messmore interviewed the owner of the diner who said that lieutenant oswalt was in the diner the same time as margie. the two weren't sitting together, but they did acknowledge one another. >> fine. how are you? >> it was a very distressing situation. not only did i work with him, i knew he was a very good policeman. but i had been friends with