In an incident dubbed "Spygate," on September 9, 2007, NFL security caught a Patriots video assistant taping the New York Jets' defensive signals from the sidelines, which is not an approved location. The NFL rules state "No video recording devices of any kind are permitted to be in use in the coaches' booth, on the field, or in the locker room during the game." Jets coach Eric Mangini, a former Patriots assistant, tipped off league officials that the Patriots might have been filming their signals. After the game, the Jets formally complained to the league.