First, you're overreacting. Settle down. Many are so quick to react that they don't comprehend what's actually being said.
Second, I say "may" for my purposes. I don't know what the NFL has. Neither do you. So I'm saying "may" from my perspective. The NFL knows what it has. I don't. You don't.
Third, the NFL hardly ever reveals its hands, particularly if it involves an investigation. You and I likely won't see those pictures unless someone leaks them, just like you wouldn't see the actual results of a drug test. That stuff is confidential.
In conclusion, I'm saying that the NFL likely has evidence of some sort. The NFL understands that it won't be able to win a case without some evidence. If they had NO evidence and proceeded with this case, Hardy's lawyers and the players union will shoot the NFL's case down like so many buckshots through paper.
The NFL has something. Now Hardy's lawyers may dispute the evidence, but the NFL isn't just going off collective memory.
And I'm not even saying that "something" is legitimate. I'm saying that "something" is some testimony, picture, video that can be interpreted to help the NFL's case against Hardy.