LISTEN: Fmr. FBI DC Head JOE PERSICHINI: It’s The FBI Guidelines. You Can’t Just Use A Hunch.

INTERVIEW: JOE PERSICHINI (PER-SIH-CHEE-NEE) — Executive Director of the DC Police Foundation and former Assistant Director in Charge of the Washington Field Office for the FBI
• Law enforcement officials told ABC News that Mateen was “on the radar” of U.S. officials for a period of time.