The executive producer of a documentary about a murder case waived the reporter’s privilege by becoming a lawyer for the subject of his film, a federal judge ruled.In a written opinion last week, U.S. Magistrate Judge M. David Weisman ordered Andrew M. Hale of Hale Law LLC and the other makers of “Murder in the Park” to give outtakes, scripts and other unpublished material to private detective Paul J. Ciolino.Ciolino and former Northwestern University journalism professor David Protess are accused in a …