In what is to believed to be a first time occurrence, the NFL has fired Down Judge Hugo Cruz in the middle of the season for poor performance. In Cruz's last game he missed an obvious false start by Charger LT Russell Okung on what became a touchdown pass (video in link below):
https://deadspin.com/chargers-score-td-on-russell-okung-s-obvious-false-star-1829741430
Here's a tweet on it: