A former city transit cop has been granted parole in the off-duty murder of man during a fight over a parking spot in Westchester County nearly 25 years ago, The Post has learned.

Richard DiGuglielmo, 53, is set to get sprung from the slammer on Jan. 7, according to the state Department of Corrections and Community Supervision.

He was approved for release following his first appearance before the state Parole Board on Sept. 11, a DOCCS spokeswoman said.

He’s currently locked up in the maximum-security Eastern NY Correctional Facility in Ulster County.

DiGuglielmo was convicted of gunning down Charles Campbell on Oct. 3, 1996, capping a violent dispute that erupted when Campbell parked in a “patrons only” spot outside a Dobbs Ferry deli run by DiGuglielmo’s father, then headed to a pizzeria across the street.

DiGuglielmo claims he opened fire to keep Campbell from bashing his father in the head with a baseball bat.

The Campbell family’s lawyer, Randolph McLaughlin, said Tuesday that the victim’s survivors — including his son, Vaughn — weren’t officially notified that DiGuglielmo was set to appear before the Parole Board.

“They, on their own initiative, sent written statements, but apparently those written statements fell on deaf ears,” he said.

McLaughlin added: “Up until today, they have heard nothing from the shooter — not a word — that he had remorse for what he had done and the pain he caused Mr. Campbell and his family.”

In a statement relayed to The Post, DiGuglielmo said, “I wish that events didn’t reach the point where I had to make a fateful decision. For that, I am deeply and forever remorseful, and wish to God it would not have happened.”

“I have expressed this to Mr. William Campbell, brother of Charles, and expressed my sorrow and regret to the Campbell family for taking Charles’ life,” he added.

DiGuglielmo served 11 years of a 20-years-to-life sentence before his conviction was tossed in 2008 on grounds that prosecutors covered up “exculpatory” evidence from witnesses who were questioned “to extract altered statements…consistent not with what they observed, but with the People’s theory of the case.”

But his freedom was short-lived and he got sent back to prison when an appeals court reinstated his conviction in 2010.

Before surrendering to authorities, DiGuglielmo shared an emotional embrace with William Campbell, who later said he felt “we’ve finally come to some sort of closure.