A manhunt was underway Monday, following a shooting in McDonald Chapel. The sheriff's office says Dereck Walker, 46, broke into his ex-wife's home, and opened fire. Habibba Moneque Walker suffered a gunshot wound to the head. She was on life support late Monday at a local hospital. The couple's children escaped unharmed. Deputies say Walker was driving a silver Acura with Alabama tag 1CM3884. Anyone with information on his whereabouts is asked to call the sheriff's office.