The father of murdered teenager Liam Ashley is calling for changes to the legal system after his son's killer was allowed to defend himself in court, in what he calls a circus.
George Baker, 29, is serving 18 years for murdering the teenager in the back of a prison van in 2006.
On Monday, he was convicted of kidnapping, threatening to kill and assault with a weapon arising from a violent incident at Auckland Prison at Paremoremo in August 2009.
Baker defended himself in the trial.
Liam Ashley's father, Ian Ashley, says a convicted killer should not be allowed to use public money to defend himself or be able to cross-examine his own victim.