Good - or not so good?

So the man who stabbed to death a burglar who was in his house armed with a machete will not be charged.  That's good, isn't it - another example of common-sense prevailing?  Yes but..... he was arrested - I don't know how long he was held in custody banged up in a cell, but doubtless his fingerprints were taken, together with his DNA, and almost certainly his house and possessions were searched.  So I doubt whether he feels particularly happy about things.  He found himself in this situation through no choice of his own, and yet has been treated like a criminal up to the point when the decision not to prosecute was taken.  Somehow we've still not got the balance right here.