The Utah juvenile murder case against the 17-year-old includes surveillance audio allegedly capturing an argument and three gunshots inside the family's home.
https://www.foxnews.com/us/utah-teen-charged-killing-mother-8-year-old-brother-mystery-final-hours-unravels-police
https://www.foxnews.com/us/utah-teen-charged-killing-mother-8-year-old-brother-mystery-final-hours-unravels-police