Las Vegas ? A fourth co-defendant pleaded guilty Monday in the O.J. Simpson armed robbery and kidnapping case, agreeing to testify against the Hall of Fame football player and one remaining co-defendant.

Charles Ehrlich entered his plea to reduced charges of attempted accessory to robbery and attempted burglary.

Ehrlich is one of five men who accompanied Simpson during a confrontation last September with two sports memorabilia dealers at a casino hotel room.

He’s now the fourth to take a plea deal, leaving one co-defendant, Clarence “C.J.” Stewart, facing trial with Simpson beginning Sept. 8.

Simpson and Stewart have pleaded not guilty to charges of kidnapping, armed robbery and assault with a deadly weapon that could put them in prison for life if convicted.