Dr. Zipper Served 34 years with the Massachusetts State Police retiring at the rank of Captain and Section Commander of the esteemed Fire & Explosion Investigation Unit and Clandestine Laboratory Enforcement Team (CLET). He earned his Ph.D. from Northeastern University, a M.S. degree in Justice from American University and a B.S in Criminal Justice and a B.S. in Media Systems and Management from Westfield State College. During his career he conducted hundreds of fire investigations, in the process mastering an expertise in witness and suspect interview and interrogation techniques.