Update: Sources report that the boy has been found and his father arrested. The Amber Alert has been canceled.
Original post: 
Colin Nathaniel Custer (view photos of the van and father)Authorities have issued an Amber Alert for Colin Custer, 4, who was last seen in Lexington County with his father, 45-year-old Robert William Custer II. The father is reportedly 5'8" and weighs about 200 lbs, and he was last seen driving a white 1988 Chevy van with a Florida license plate. Anyone with information should call 911 immediately.
The State Law Enforcement Division has photos of the child, the father, and the van, as well as contact information for Lexington County authorities.
From Live 5 News:
A Florida woman says her ex-boyfriend abducted her and their son and now has the boy alone after she escaped when they got to South Carolina. Lexington County authorities found the boy's mother locked in a gas station bathroom Monday morning. She told them the child's father abducted them Sunday after a court-ordered visitation. Authorities say Robert William Custer II is considered armed and dangerous.
From The Post and Courier:
Colin Nathaniel Custer, 4, is reported missing. Colin was last seen wearing a grey short sleeve shirt with blue and red stripes, navy shorts, and tan shoes with blue stripes. He is 3 feet tall and weighs 35 pounds, with blond hair and hazel eyes.
