> It is absurd to claim that this should not have happened. All detection methods have a false positive rate

Getting a partial match is a false positive. Using that partial match to investigate the 20 people who have a partial march is the consequence of that false positive.

To then say that he travelled as a terrorist u der a fake passport because they doscovered that his passport had lapsed and that he hadnot travelled abroad - that should not have happened and I do not feel absurd for saying that.

Surveilling someone so poorly that they know you're following them, and using their awareness of being surveilled as evidence of their guilt should not have happened.

Locking him up for 2 weeks should not have happened.