Using Peplaw's example, I actually think in some cases it would be okay if the NFL followed through with a suspension even if a case had to be thrown out of criminal courts due to a lack of evidence.
If evidence isn't collected with proper warrants for searches, monitoring, etc., that evidence is inadmissible even if there is clear audio/video of the individual committing the crime.
In cases like that I won't cry foul as much. That's pretty much the only way that I'll accept this 6 game suspension as fair punishment. The NFL has to produce some type of evidence that shows w/o a shadow of doubt that Zeke committed those.
None of that "more likely than not" bullshit they were espousing during the deflategate drama.