When is it right to "whistleblow"?

The NFL has been rocked by the "bounty" scandal in which New Orleans Saints defensive co-ordinator Gregg Williams paid players to injure the opposition. The saga took a new twist last week when audio was released by documentary-maker Sean Pamphilon of Williams ordering his players to "go for the heads" of players who had a history of concussions and to injure the ACL (anterior cruciate ligament) of a player who had a previous knee injury. The problem was that Pamphilon was only in the room to hear those words because he was filming a documentary on former Saints player Steve Gleason, who has a terminal illness. In releasing the audio Pamphilon has ruined his relationship with Gleason. ESPN spoke to Pamphilon, who himself doesn't know if he did the right thing.