The priest formerly assigned to East Windsor’s two Roman Catholic churches and a former altar boy are continuing to trade charges, even as the last of three criminal cases stemming from their former friendship moves toward a conclusion after more than three years of litigation.

The Rev. Paul A. Gotta — formerly administrator of St. Philip Church on South Main Street and St. Catherine Church on Windsorville Road — had been scheduled to be sentenced Wednesday in U.S. District Court in Hartford for giving about 2 pounds of black powder to the altar boy. Federal law prohibits providing explosives to a person younger than 21.

But Judge Robert N. Chatigny has postponed the sentencing to Dec. 7 as a result of a motion by Gotta’s lawyer, Moira L. Buckley, requesting more time to prepare.

Buckley said in the motion that the former altar boy, Kyle D. Bass, whom she referred to only by his initials, has made “numerous additional allegations,” related to the federal case and to a closed state case in which Bass accused Gotta of sexually assaulting him.

In the state case, Gotta was convicted in a plea bargain only of second-degree breach of peace. He received a suspended sentence and probation, as Bass did after being convicted in the same court of possessing two gun silencers.

Buckley said the “additional allegations” figure prominently in a probation officer’s report on Gotta’s background that the judge will consider in choosing the sentence.

The defense lawyer said in the motion that the “issues related to these allegations and K.B.’s credibility” can be resolved only by the judge. As a result, she said, she will need to obtain some of Bass’ medical records.

She said a federal prosecutor has told her that Bass won’t consent to release of the records. As a result, she said, she has issued a subpoena for the records and will need to seek “a qualified protective order” for them to comply with the federal Health Insurance Portability and Accountability Act, or HIPAA.

Prosecutor Robert M. Spector said when Gotta pleaded guilty in March that federal sentencing guidelines call for the priest to get six to 12 months in prison and a $2,000 to $20,000 fine. The guidelines permit probation for defendants in that range, although they call for “intermittent confinement, community confinement, or home detention.”

Because the guidelines are no longer mandatory, Chatigny, who tends to impose prison time sparingly, won’t be bound even by those recommendations.

Gotta spent six days in jail after his arrest in the federal case in July 2013, records show. He has been free on a partially secured $500,000 bond since then.

Gotta and Bass started trading accusations in 2013, which, together with physical evidence found in law enforcement searches, led to both of them being arrested.

First, Gotta told East Windsor police that Bass had made threatening comments to him as well as comments suggesting an interest in mass killings.

As a result, authorities searched the property where Bass lived at 116 Winkler Road in East Windsor and found pipe bomb components, including the 2 pounds of powder, as well as ammunition, silencers, and “what looked like a homemade shotgun,” Spector said at the March hearing.

Although Bass has been referred to only as K.B. in the federal case, he has been publicly identified in state court as a result of his own arrest.

Gotta admits that he aided or encouraged purchase of ammunition by Bass and that he illegally gave him the black powder, but he denies he intended to help with the manufacture of a “destructive device,” according to his lawyer. He said he intended the powder for use in refilling shotgun shells.