Are we talking about Mark "Chopper" Read?

If we are, then this is what I know:

Basically this guy, nicknamed "Chopper", was a psycopathic killer sometime in the 1980's. He cut off his own ears, is covered in tattoos. He's a cold blooded killer but he'd go so far as to drive his victims to hospital.

When he was in jail he wrote books, and they became best sellers. A year or so ago they made a movie about him, which was actually very successful.

He's something of a cult hero because he showed remorse after killing the people he did, is actually very intelligent and has built up his life to be something. He knows exactly what he is (a murderer and scum), and doesn't deny it. He is scary, but has a witty sense of humour.

That's all I know about him really. I saw him on the news a couple of nights ago, and they were showing him scenes from the movie based on his life, and at points when he was killing people he was actually laughing.