The federal judge who sentenced Mayor Marion Barry to six months in jail on a misdemeanor cocaine possession conviction says he believes four jurors were determined to acquit Barry and misled the court during jury selection.

U.S. District Judge Thomas Penfield Jackson also told a Harvard Law School forum Tuesday that he had "never seen a stronger government" case against a defendant.He remarks in Cambridge, Mass., were reported by The Washington Post

Meanwhile, Former District of Columbia Police Chief Maurice Turner said Tuesday that Barry was the target of undercover drug operations other than the one that led to his trial and conviction.

Turner declined to provide details on the sting operations against Barry, which he first mentioned in response to a question about whether he would have approved such a tactic against his then-boss.