the reason why the daily mirror uses anonymous accusers in trying to boost its sales by slandering jimmy savile and others

The reason the Daily Mirror uses mostly anonymous accusers in attempting to boost its sales by slandering dead celebrities, is because every time it names one of its sources, we discover that the source has a rap sheet as long as your arm featuring jail time, drug crime, money laundering and offences involving violence to children.
You couldn't make it up.