An official committee is calling for tighter controls to stop violent offenders going home and killing their partners or children after coming out of jail.
The new Family Violence Death Review Committee, which has conducted pilot reviews of three family homicides to test plans to review all such deaths in future, says the three cases have shown the importance of a systemic focus on victim safety when offenders with a history of family violence are released.
A Corrections Department spokesman confirmed that the department was reviewing its procedures.
Last week the Parole Board refused to release former Air Force sergeant Warwick Keith Bennett, who was convicted of killing his first wife in 1982, on the grounds that he posed a risk to his second wife.
The committee, chaired by Auckland University associate professor Julia Tolmie, found that 186 people died from family violence between 2002 and 2008, an average of 27 people a year. There were 42 family violence deaths in 2009, almost half of the 88 homicides in that year.