was gone, too. >> they had a look around the truck. no sign of a struggle. dusting revealed no viable fingerprints. there were no footprints. not even a loose hair. puzzling. was there any thought once you saw the scene that this was a suicide? >> there was things missing that prevented the suicide theory. >> like what? >> if you're going to commit suicide with a gun, it's usually at the scene. >> it was clear teresa had been murdered. shot with a gun which was now missing. and what was more, her cell phone, the one that was always attached to her hip, was nowhere to be found. >> did it look like it could have been a robbery? >> well, the wallet wasn't taken. the purse was on the console. but the contents of the purse had been dumped out in her lap. >> a clumsy attempt at staging, you might say? >> yes. >> but there was one important