Another of Randol's daughters, Harley Martin, told WOOD-TV that despite the situation, her adoptive brother is "not a bad kid."
“He loved his mom,” she told the news station. “I don’t want people to think he did not love his mom.”
She said the 9-year-old has a history of mental health issues but that he “just recently started snapping” and recently began a new medication.
"He's traumatized by what he saw in there. That's all he told my dad about, was seeing (Randol)," Harley Martin told WOOD-TV. "It's going to mess him up for a really long time because he does not realize what he's done."
Randol's neighbor, Joseph Lancaster, told WDIV-TV that he'd previously seen the boy shooting a BB gun and a bow and arrow.
“He shot at my grandkids with the BB gun,” Lancaster said. “I told him, ‘I’ll spank your butt if I catch you doing that again.’”
The boy was undergoing a psychiatric evaluation at a state-run juvenile facility, according to county Sheriff Bradley Balk. It wasn’t immediately clear if he was charged as an adult or a juvenile.
Authorities have not released the circumstances of the killing or details of why the child was charged.
The Associated Press contributed to this report.