Police said he had a "blueprint to commit murder."
A Liberty Township, Ohio teen has been charged with attempted murder, attempted aggravated arson after police said he allegedly tied his parents' bedroom door shut and set fire to their house Wednesday.
The teen's father broke both legs jumping from the second-story, and responders found his mother dangling from the bedroom window when they arrived, according to USA Today.
"I never saw it coming. I never would have never guessed that one of my friends would go off the deep end like that," Kameron Thornton, who said he was friends with the accused 16-year-old teen, told WLWT.
The teen's name has not been released because of his age. Thornton told the station that his friend had complained about problems at home before, but not anything out of the ordinary.
According to USA Today, the teen had no previous psychological issues, and no prior criminal record. He his now being held in Butler County Jail.
But investigators say that the high school honor student's plans to murder his parents were anything but ordinary. According to the Dayton Daily News, police found "written documents, described as sketches, outlining the plan," which are now being used as evidence in the case.
"This is to [sic] the most extreme that I've seen in my career... There was [sic] drawings of how this was to be done and words also," Butler County Sheriff Richard Jones told WLWT. "It was very explicit what he was going to do and he kept to his drawing as it appears."
According to the station, if the case goes before a grand jury, it is likely that the boy will be charged as an adult. He could face 20 years in prison if convicted.
Sadly, this kind of incident has happened before. Earlier in October, a 14-year-old Kansas teen was charged with the murder of his mother and sister after police say he deliberately set fire to the family's home.