The Guardian Angels founder said Friday a judge "obviously needs to get mugged" after the judge compared the volunteer crime-fighting group to the Ku Klux Klan.

An angry Curtis Sliwa said he is thinking about pulling the Guardian Angels out of Baltimore."We may have to leave," the group's founder said by telephone from New York. "The city of Baltimore takes the side of drug dealers."

Two Guardian Angels and two former members pleaded guilty to charges of assault and false imprisonment Thursday, the third day of their trial before Baltimore Circuit Judge David Mitchell.

The convictions stemmed from a July 24 "citizen's arrest" of James Lewis, 25, who received 40 stitches to close cuts suffered during the incident.

The Angels said Lewis was sniffing glue when they pounced on him, but police did not find a bag with glue, prosecutor Barry Watson said. Lewis was not charged.

"Guardian Angels - that is a misnomer," Mitchell said. "In my mind, to this judge, I see no difference between what this organization is and the Ku Klux Klan. If you're supposed to be my Guardian Angel, then I'll go in the other direction."

Calling the group, "little boys dressed up like soldiers," Mitchell said, "It is not up to you to decide when you will and where you will not abide by the law."

Sliwa said Mitchell's remarks were unjustified and that most of the group's members are minorities. One of those convicted Thursday is black.