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The campus officer who disarmed the suspected gunman at the University of North Carolina at Charlotte this week is a former member of the NYPD’s elite Emergency Service Unit, who said the specialized team “prepared” him for that moment.

Retired NYPD Det. Rich Gundacker, now a patrol sergeant for UNC Charlotte police, couldn’t find suspected killer Trystan Andrew Terrell in time to save the lives of Ellis Parlier, 19, or “hero” student Riley Howell, but when he did locate the alleged gunman, he was able to safely disarm him thanks to the training he received in the Big Apple, he said.

“I’m proud of my actions yesterday and owe it to all the great member and training that the best unit in the world taught me over the years,” Gundacker wrote in an undated post to a Facebook group for ESU officers.

Gundacker left the department in 2015 after 20 years on the force, an NYPD spokeswoman told the New York Post.