that prosecutors didn't really have any hard evidence. what they had was this wonderful recreation? >> that's true. yes. >> juries like hard evidence. >> you're absolutely correct. we fought very hard. >> after a six-day trial, the jury found scott purk guilty of murdering meg, as well as tampering with evidence. >> it was almost unbelievable. after all this time, it finally came through. the truth is out. he's guilty. he's going away. >> the judge gave scott purk 15 years to life on top of his arson sentence. we may never know why scott purk murdered meg, or why he mentioned her to the detective mifflin that night, as they watched his house burn. we do know that if he hadn't,