Former Suffolk County Police Commissioner Rodney Harrison spoke with Lisa Evers about the Gilgo Beach murder investigation and how renewed cooperation between law enforcement agencies helped move the case forward. Harrison discussed the creation of a task force, working with the FBI, state police and local agencies, and the key role technology, evidence and a vehicle connection played in identifying Rex Heuermann as a person of interest. He also reflected on the victims’ families and his new book, “Commissioner: From street cop to top cop in the NYPD.”