He was 29-years-old and committed his horrendous crime alone. He was a social misfit, didn't have a regular job and became a mass murderer. What made MARTIN BRYANT, who is doing life in Tasmania's Risdon Prison, go on a killing spree at Port Arthur taking the lives of 35 people?
Gangland figure CARL WILLIAMS killed five people. Police belive he's involved in other deaths. But what led him to do what he did? How did he go from being a cheeky, round-faced kid to a dangerous murderer?