@dailymail: Lawyers for the teenage boy accused of slaughtering his parents and three siblings in Fall City, Washington, have doubled down on his claim that his younger brother committed the crimes as part of a murder-suicide. Documents we obtained show the accused shooter claiming his younger brother shot the family members and killed himself after being caught watching p*rn. The 15-year-old left only his younger sister, 11, as the only survivor and she claims it was her eldest brother who fired the shots. The teen's attorneys insist his murder-suicide theory is 'forensically viable,' according to court documents obtained by The Seattle Times. #fallcity #murder #crime #teen #lawyer #washington #sibling