David Bookstaver in 2013 Rick Kopstein/NYLJ

Court officials are looking deeper into the conduct of former communications director David Bookstaver, who was fired on Aug. 17 after butt-dialing a New York Post reporter and admitting that he hasn’t been showing up for work, for possible criminal charges.

Bookstaver, who began working for the court system in 1996, was recently contacted by a Post reporter to confirm allegations that he had been coming into work as little as twice a week.

Bookstaver denied the allegations and ended the call, but inadvertently called the reporter back, the Post reported, and left a message in which he is heard telling others that the allegations actually were true and that he had indeed been phoning it in.

Bookstaver was fired shortly after the Post published its story. Weeks from retirement, his annual salary was about $166,000.

In an emailed statement, Lucian Chalfen, a spokesman for the Office of Court Administration, said that Chief Judge Janet DiFiore ordered the court system’s Office of the Inspector General to conduct a “full review of the circumstances surrounding David Bookstaver’s actions[,] including a review as to whether Mr. Bookstaver’s behavior warranted a criminal referral for prosecution or other action.”

Bookstaver, like other court system employees, submitted electronic time sheets.

A source with knowledge of the investigation said the court system is working with the Manhattan District Attorney’s Office in a joint investigation into Bookstaver’s conduct.

The Manhattan DA’s office declined to comment.

The Post also reported that the episode led to a statewide conference call between court administrators and top-level managers to demand an end to any un- authorized absences and to re-mind judges to be on the bench by 9:30 a.m.