michelle's death was an accident, and luke hasler was convicted of first-degree murder and sentenced to life without the possibility of parole. his version of what happened almost seemed plausible until the evidence showed it was all a lie. >> a lot of people are either killed or seriously injured in car accidents, so there's a lot of data about what type of injuries those cause. those were nowhere like michelle's injuries. so the medical examiner's report was critical to say, no, this was not a car accident. >> we knew they had him, but without evidence, they couldn't have put him away, they couldn't have found him guilty. >> a lot of what forensics does is to corroborate or disprove stories. we answer questions by looking at physical evidence, and we're able to say that story fits or that story doesn't fit with what we're seeing here. >> the forensic evidence gave us the cause of death, and it also