NATIONAL PARKS: Whistle-blowing chief steps down -- this time on her own terms Robin Bravender, E&E reporter Published: Friday, November 22, 2013 U.S. Park Police Chief Teresa Chambers is leaving her post for the second time in the past decade. Please subscribe to Greenwire to read the full story. Username: Password: Forgot your access codes? Recover them. Not a subscriber? Sign up for a trial. Ready to subscribe? Click here.