Circuit Judge Sam Pope declared a mistrial Thursday in the Bobby Robertson first-degree murder after the deputy prosecutor trying the case made a reference to Robertson’s criminal history.

Bobby Robertson, 30, of Crossett is charged in the August 2011 shooting death of 23-year-old Lajarris Walton, of Warren.

Walton, 23, of Warren, was fatally shot at the intersection of Pierson and McCauley streets on the west side of Warren.

During opening statements at Robertson’s trial, 10th Judicial District Deputy Prosecutor David Cason made a reference about Robertson’s criminal history and Robertson’s defense attorney promptly made a motion for a mistrial.

Pope granted the motion.

“The state, under the rules, has up to a year to retry someone following a mistrial,” said 10th Judicial District Prosecutor Thomas Deen. “Judge Pope hasn’t reset it yet; I expect it to be sometime early next year.”