Back in July, the NFL suspended Baltimore Ravens running back Ray Rice for knocking out his then fiancee in an elevator.
Surveillance video revealed Rice dragging her seemingly unconscious body out of the elevator.
Unreleased video showed him delivering the blow.
The punishment from the NFL: two games--less than it would have been for DUI, substance abuse or even using steroids.
While the league defended the length of the suspension, the response from fans and domestic violence abuse groups was outrage.
Thursday, a week before the start of the season, ESPN obtained a letter written by commissioner Roger Goodell sent to all NFL owners outlining new guidelines covering domestic violence that could result in a lifetime ban from the league.
Jane McManus from ESPN.com shares more.