An MBTA trolley driver paid a friend $2,000 to don a Halloween mask and "attack" him while he was on the job, allowing him to fraudulently collect workers' compensation and disability insurance, according to authorities. Thomas Lucey, 46, is facing charges of insurance fraud and other counts, including misleading police, after the bizarre plot crumbled when police pulled fingerprints off a fake plastic pumpkin the so-called "attacker" left behind and traced it back to Lucey's friend, according to Transit Police and prosecutors.