sparks flew when katie beutler met army staff sergeant john blauvelt. he worked as an army recruiter in local high schools. she worked at a sandwich shop next to his office in fountain inn, south carolina. katie fell hard even after learning that john was married and had a child. >> she loved him so much and wanted to be a family with him and his young daughter. >> and katie made her dream come true. eventually marrying john. but mere weeks after the i do's trouble was already percolating when police say john blauvelt started throwing underage parties at his house. >> there were some minors in the house and some others that were 17 or older. >> it seemed john wasn't only recruiting for the u.s. army, he was recruiting for his own pleasure. and katie didn't like that. >> a lot of the kids that hannah was hanging around were hanging out at his house. >> one of the partygoers is 17 year old hannah thompson. her worried parents alert police that their daughter is spending a lot of time over at the blauvelt, by south carolina state law. >> she was an adult,

john blauvelt, a 27 year old army staff sergeant who stood accused of stabbing his young wife to death, then running off with his 17 year old girlfriend, dumping her and then living life as a fugitive for years. the case came to a dramatic, close and true crime news has new details about the night of the murder. >> it was john and perfect husband. absolutely not. absolutely not. >> as trials go, this one was fast and furious. >> but as being a terrible husband make you guilty of murder? no >> just four days from gavel to gavel. and in the end, the guy who got away with murder for almost eight years finally pays the price for his crime. we, the jury, unanimously find the defendant, john kate lavelle. >> lavelle. guilty. >> some of the details revealed for jurors. so disturbing. >> john bournival did not hesitate when he plunged that knife into katie blackwell's neck. >> family members urged the judge to put him away forever. >> john gave me a life sentence, a life sentence without katie. john deserves the same life sentence, my friend. >> she's been missing for, i think, 30 hours now. a