Las Vegas girl, 16, and boyfriend, 18, are arrested in Salt Lake City after they stabbed her father to death, tried to dismember his body with a chainsaw, and set fire to his house - before they drove 400 miles in victim s stolen car
Aaron Guerreo, 18, and Sierra Halseth, 16, are facing counts of open murder for the killing of the girl s father, Daniel Halseth, 45
Police in Las Vegas say Halseth was stabbed and set on fire, not long after speaking out against his daughter s relationship with Guerrero
Sierra and her boyfriend allegedly bought multiple saws and attempted to dismember Halseth s body in his garage