You know the accident in Linate a couple of years ago was partly attributed (*) to the controller not questioning the responses of the pilot of the GA aircraft which crossed the runway at the wrong point.
Similarly, if a security person failed to react to suspicious circumstances such as those reported in this case and an accident happened you'd all be up in arms against him/her.
Ditto if he/she had failed to report a drunken passenger that went on to commit air rage.
You can't judge (as many of you are) the case in question unless you are directly involved in it, neither should you be speculating as to the causes, circumstances or final outcome, if anything to let the legal aspect take their course.
In short, as the saying goes you can’t have your cake and eat it too.
(*) Allegedly, the case is probably still being investigated.