Some times you just have to accept the situation. In law enforcement you can often get information that raises more than mere suspicion on a person. The problem is that you sometimes cannot use the information in court or even mention it because other people may be at risk.
It is a sad fact that this guy was arrested, put in prison and his career is in tatters. But he is alive and so are many other people, including pilots, who fly every day. Difficult decisions have to be made and they will affect others to varying degrees. Flying is still a compromise.
There may and may not be susbstance behind the claims against him but the truth is unlikely to ever be known, and for very good reason.
This is why we have terrorists. They play on these difficult situations and all the media hype.
There is no easy answer to this. If he fights it he is wrong, if he wins it he is wrong. He is just another victim of terrorism and should look on the bright side - he is alive and has his health, now he needs to move on.