The car had veered off Route 7, north of Route 71, and struck two mailboxes before coming to a stop.
Roberts could not be reached for comment Wednesday.
Attorney General Beau Biden recently named Roberts to head the Child Predator Unit. A spokesman at Biden's office says Roberts is no longer in charge of the unit.
A hearing is scheduled for Roberts next month in Justice of the Peace Court.
Information from: The (Wilmington, Del.) News Journal, http://www.delawareonline.com