A former Boston police officer who was charged in October with lying to an FBI agent who was investigating a violent street gang in Roxbury has agreed to plead guilty.

Mel Steele, 36, is slated to plead guilty on Dec. 1 to one count of lying to the FBI during the course of a federal investigation.

Steele, who was assigned to the department’s Youth Violence Strike Force, resigned effective Oct. 17, a week before he was charged in federal court.