Article continues below advertisementA retired New York City cop blames Pima County Sheriff Chris Nanos for blowing the case of Nancy Guthrie, the missing 84-year-old mother of Today show co-host Savannah Guthrie, due to "ego, incompetence and politics."Retired NYPD Lieutenant Michael Gould, an expert in search and rescue and a founding member of the NYPD K-9 unit, has been a vocal critic of Sheriff Nanos regarding the investigation into Nancy's baffling disappearance."I've been an outspoken critic of his from the very first few press conferences," Michael told The New York Post.