He became eligible for parole last year and was declined. He went before the board again on April 5 this year and did not seek an early release.
Since then he has completed a drug treatment programme in prison and a Parole Board report released today stated he was "making good progress".
However he had much more to do before he could be release.
The board said Namana need to complete further programmes and "prepare a relapse prevention plan". The report revealed Namana had approved accommodation for when he was released but had "high reintegration needs".
"That is not surprising given his lengthy time in prison. Once his rehabilitation treatment is finished, sound and sensible decisions will have to be made as to his reintegration pathway," the report said.
He is not seeking parole today and of course there is much more for him to do but his rehabilitation progress is very encouraging," said board panel convenor Justice David Gendall.
Namana would be seen again by the board in November this year.