A former Black Power president with two murder convictions and a high risk of re-offending is due to be released on parole this month.

Denis Richard Luke has spent the last 21 years in prison for orchestrating the murder of New Plymouth man Christopher Crean in 1996.

The murder was payback for the victim giving evidence to police on a Black Power assault he witnessed.

At the time of the killing, Luke was on parole for another murder committed in the early 1970s.

Special conditions of parole mean Luke is unable to enter Taranaki, or contact Black Power members, without approval of a probation officer.