JACKSONVILLE, Fla. -- The man arrested in connection to the fatal shooting death of a 3-year-old boy, as well as shooting his mother three weeks ago has been charged with murder.

Brian Kevin Littles, 22, was arrested in connection to the shooting incident in Mixon Town that happened on Oct. 19.

Police say he entered a home located at 2073 Broadway Ave. through an unlocked window with a gun. They say he had the intent of shooting his ex-girlfriend's new boyfriend.

Littles found his ex-girlfriend, Rashaela Mickens, in a room with her boyfriend and her 3-year-old son, Connor Mickens. Rashaela Mickens' boyfriend and Littles exchanged gunfire and during this exchange, Connor Mickens was shot in the head, police said. He later died on Oct. 21.

Littles surrended to police on Oct. 20. He was originally charged with misdemeanor battery and a second-degree felony charge of unlawful possession of a firearm by an adjudicated delinquent.

He was charged with murder Thursday, along with committing an armed burglary.