A convicted murderer who fatally shot an off-duty NYPD officer during a robbery in Brooklyn nearly 40 years ago was released on parole earlier this week — the 37th cop killer in the state granted their freedom in just six years.

Alexander Evans, who gunned down Officer James Holmes on March 23, 1986, was sprung from Otisville Correctional Facility on Monday after the state Parole Board decided in favor of his release, state records show.

Evans, 57, was serving 32 years to life for killing Holmes, 47, an NYPD housing cop with 17 years on the job who left behind a wife and four children.

Of the 37 cop killers released since 2017, 33 were murdered NYPD officers.