it all comes down to !
if you bag them or defame them and you are wrong you can do damage that can never be repaired e.g when a paper has a front page saying someone did something and its wrong they put the retract on page 100 and in small writing no one will see the small writing so the damage is always going to be there! or if someone owns a company and someone that works for them does crap work the company gets the blame, but the customer wont believe it was a stupid employee to them it is the company!
this is why the law takes the view, that its there to protect the innocent and convicting a felon is secondarie!
sorry for the typo's.
mick