Kenton Evans told ABC11 Treyvon Evans is a good person, and just made a mistake the morning police say he stabbed 62-year-old Carolyn Hemingway to death.
Treyvon and his dad recently spent some time talking in jail and Evans said his son told him he did not do it.
"I know for a fact he loved his grandmother, so how it got from the point they were supposed to be arguing to the point that she's no longer here, I have no idea how they got to that point," Evans said.
The teen is also charged with stabbing his 4-year-old brother.
He will remain in jail without bond until his trial.