"For a combination of reasons -- I'd say a big part of it [being] mistakes that I personally made -- it just didn't work out the way that we had hoped it would," Belichick said. "But we got it right the second time."

http://www.espn.com/blog/new-england-patriots/post/_/id/4810947/safety-patrick-chung-one-of-best-mistakes-bill-belichick-ever-made