Convicted cop killer Herman Bell was released Friday after 44 years in prison.

A van transporting Bell was seen leaving Shawangunk Correctional Facility in Ulster County Friday evening.

The Patrolemen's Benevolent Association wanted Bell to stay behind bars until its case is heard before an appellate panel next week, but that was denied.

Bell was convicted of murdering two NYPD officers in 1971 in Washington Heights.

PBA President Pat Lynch says the board didn't review the "victim impact statement" given by Officer Joseph Piagentini's widow before making its decision to release bell.

"They didn't look at the testimony of Mrs. Piagentini. They only looked at the testimony given by the parole commissioners by the murderer," Lynch said.

"They had a criteria. They had a criteria that they themselves chose to do, to work with," said state Senator Martin Golden of Brooklyn. "It's not structured in law. We need to structure that in law."

Lynch and Golden held a press conference Friday demanding that Governor Andrew Cuomo and the state legislature close what they call "loopholes" in parole criteria.