Gilgo Beach serial killer Rex Heuermann’s longtime shrink practiced as a clinical social worker without a license for years — and is facing felony charges over tens of thousands of dollars in bogus insurance reimbursements. Alison Winter, 52, who was Heuermann’s jailhouse therapist for nearly three years, had already been charged with three counts of grand larceny when she was present for his confession to his wife and daughter that he had murdered eight women, Newsday reported . She was