Sean Taylor, the Washington Redskins football player who was gunned down in his home last year, died because he took a knife to a gunfight. The NFL contributed to the circumstances of his death by insisting on a "no guns" policy for NFL players, putting all their people at risk of being unarmed victims.
Sean Taylor, awakened in the middle of the night by the noise of someone breaking into his home, armed himself with a machete to protect himself and his family. His attacker was armed with a firearm, and shot and killed him.
What if Sean Taylor had had a gun? Chances are better than even that he'd still be alive today. But all he had was a large knife, and now he's dead. He never had a chance.
The four young thugs who were bent on robbing Taylor are primarily responsible for his death. But the league is complicit because they foster an attitude of disarmament and submission among their personnel. NFL players have a high profile, are often famous, wealthy, and thanks to the NFL, unarmed and unprotected.
This is only the beginning, folks. There will be much more of this as long as the NFL clings to this insane policy. In an article at Reasononline this league policy and the weak rationale behind it are discussed at length. Read the whole thing.