Headquarters in new york, this is nbc nightly news with lester holt. Good evening. After further review there is a scientific explanation for those under inflated footballs the new England Patriots used in last weeks playoff victory over indianapolis. Coach Bill Belichick who after claiming to know nothing about the controversy during a thursday News Conference unexpectedly went before the cameras again this afternoon, this time with a lot to say about what the team discovered in its own tests and how those footballs likely ended up the way they did. Nbcs Kristen Welker is following todays Surprising New developments in the saga. Reporter a defiant patriots coach Bill Belichick known for his distaste for facing the press said he had to speak out today to set the record straight. I believe now 100 that i have personally and we as an organization have absolutely followed every rule to the letter. Reporter the team has under fire for the controversy known as deflategate, allegations the p