The mother of convicted drug smuggler Schapelle Corby says her daughter wants to have a baby, even if she remains in jail.

Three police officers are facing charges over allegations of assaults done on duty, including a case in which an alleged victim was injured so badly he lost a testicle.

Phil Goff rejected mayoral pleas to reduce the height of the Mt Eden Prison development when he was Minister of Corrections in 2007.

The three-strikes legislation will become law, after the National-Act Party bill passed its third reading in Parliament last night.

Police say further charges are likely against the inmate accused of killing a prison officer on Saturday.

A prison inmate was awaiting transfer to a high security prison at the time of a fatal attack on prison guard Jason Palmer, the Department of Corrections says.

A prison guard who wanted to spend his entire working life with inmates has been killed on duty after only six months in the job.

Department of Corrections bosses say staff safety is paramount following criticisms made in the wake of the death of slain prison officer Jason Palmer.

The Deputy Police Commissioner has dismissed the idea that police had failed in their "duty of care" toward Navtej Singh.