Paul E. Sigmund IV, 49, son of the late Princeton Borough Mayor Barbara Boggs Sigmund, pleaded guilty Tuesday, May 12, to a drug charge and two motor vehicle offenses. He was ordered to pay $1,925 in fines and will be under court supervision until he successfully completes substance abuse treatment. Mr. Sigmund was charged by Princeton police after an incident in Sept. 21, 2014, in which his Chevy Malibu hit a 3-inch-pole in a Princeton parking lot and heroin and hypodermic needles were discovered in his vehicle. Mr. Sigmund is a former Mercer County Freeholder and was once chief of staff to former Trenton Mayor Tony Mack.