In Newark, church officials instructed priests not to speak to journalists. Several who spoke, on condition of anonymity, expressed dismay at the use of cellphone data to track priests. Even lay leaders were reluctant to discuss the controversy on the record, although not many parishioners appear to be aware of it.
The Pillar has not said whether it plans to publish more reports using cellphone data, but priests in other dioceses have waited anxiously to see whether it would publish anything about their communities.
Father Bob Bonnot, the executive director of the Association of U.S. Catholic Priests, said the use of cellphone data to track the movement of Monsignor Burrill had deepened a sense of vulnerability many priests feel.
“It can be terribly threatening,” he said. “It can make all priests uncomfortable and worried.”
Mr. Flynn and Mr. Condon are canon lawyers well known for their work at the Catholic News Agency, which is owned by the right-leaning Eternal Word Television Network, and their ties to conservatives in the church.
The Pillar provided information about its findings to the Archdiocese of Newark after church officials spent several weeks asking for details, said Maria Margiotta, an archdiocese spokeswoman. She said church officials were reviewing the findings.
“It is not acceptable for any member of the clergy to use any app, social media or website in a way that is inconsistent with Church teachings and their own religious vows,” she said. “We are committed to protecting the faithful, and when we learn of immoral behavior or misconduct, we immediately respond appropriately to address concerns.”
Elizabeth Dias contributed reporting from Washington, D.C., and Jason Horowitz contributed reporting from Rome.