Twenty-two-year-old Ellison Matthews is accused of murdering his future stepdaughter. Police said the injuries were related to sexual abuse.

Two-year-old Michelle Spinks died Sunday. She's the granddaughter of famous boxer Michael Spinks.

Matthews was baby-sitting Spinks and her three young brothers at their Tucker home Saturday when Matthews called 911 to report the child unresponsive.

Her injuries included severe external bleeding and brain damage.

Matthews made his first appearance Monday afternoon.

He told CBS Atlanta, "I didn't do it."

He's being held in the DeKalb County Jail without bond.