MOUNT VERNON - A Westchester County police chief is proving his work is no desk job: He helped arrest a robbery suspect.

Mount Vernon Police Commissioner David Chong and Deputy Chief James Dumser were retuning to headquarters from a school visit Thursday when they heard about a search for two suspects in a street mugging. Chong and Dumser jumped into a patrol car and began looking.

Chong says they spotted someone who matched one suspect's description running through a park and followed him on foot. Chong says the 16-year-old suspect ducked into a bathroom and then tried to escape, but the commissioner grabbed him.

Other officers formally arrested him on a felony robbery charge. A second, 17-year-old suspect was arrested elsewhere.

Chong credits his officers. He says he “just happened to be out there.”

Information from: The Journal News, http://www.thejournalnews.com

AP-ES-09-20-08 2012EDT