Christopher Aurier, 26, gave up the ghost in the hospital after he was shot in the stomach outside a nightclub in the southwestern city of Toulouse in the early hours of Monday.
A man out of the blue went to a police station on Tuesday and said he had been the gunman who pulled the trigger, the police source said.
The prosecutor’s office confirmed that a man was being held over death.
The reason behind the shooting could have been an argument over a girlfriend,a Local newspaper La Depeche reported.
Read also: Tottenham Player, Serge Aurier’s Brother Shot Dead In France
Christopher Aurier was once perceived as a more promising prospect than Serge, who is a year older, and the two came up through the ranks at Lens.
But while Serge went on to play for Paris Saint-Germain and Ivory Coast before moving to Premier League club Tottenham in 2017, Christopher failed to establish himself in a major club and had been playing this season for fifth division club Toulouse Rodeo.