STATEN ISLAND, N.Y. -- A Staten Island cop who allegedly shook down a Queens restaurateur will remain behind bars after a federal judge rejected his "substantial" bail offer, said prosecutors.

Magistrate Judge Cheryl L. Pollak of Brooklyn deemed Besnik Llakatura a "danger to the community" and a flight risk, court papers show.

Llakatura, 34, is among three defendants charged last week with extorting $24,000 in "protection" money from an unidentified victim, according to Loretta E. Lynch, U.S. attorney for the Eastern District of New York.

The other defendants are Redinel Dervishaj, 37, of Queens, who last year fatally stabbed a groom-to-be outside an Annadale restaurant, and Denis Nikolla, 33, of Brooklyn.

Neither Dervishaj, whom a grand jury last year declined to indict in the March 17, 2012, slaying of Antonio (Anthony) Lacertosa, 27, outside the former Espana Restaurant, nor Nikolla have presented bail packages, said Ms. Lynch's spokesman.

All three defendants remain incarcerated and were ordered back in court Friday for a status conference, he said. No trial date has been set.

Last week, the defendants pleaded not guilty to charges of extortion conspiracy, attempted extortion and firearm possession, said court documents.

The alleged shakedown occurred between May and November of this year, said court papers.

According to authorities, the victim was repeatedly threatened with violence and intimidated to ensure his compliance.

When the man sought help from his friend Llakatura after Dervishaj threatened him, the officer told him he had no choice but to make the payments, said authorities.

"Make sure you don't call the cops, because if you call the cops, you're done," court papers quote Llakatura as telling the victim. "These people, they run Astoria."

Llakatura, who was assigned to the 120th Precinct in St. George, did not reveal to the victim his relationship with the other suspects, said court papers.

The victim, like the defendants, is of Albanian descent, authorities said.

Court papers said Llakatura presented a bail package with six sureties; however, those documents don't state a dollar amount.

Ms. Lynch's spokesman said it was "substantial."

Judge Pollak rejected the package as "insufficient," finding that Llakatura is "a danger to community and a flight risk," said court records.

In court papers, prosecutors said Llakatura discussed taking a trip to Albania in wiretaps recorded before his arrest. He also has connections to Albanian law enforcement, court documents said.

Llakatura's lawyer, Jonathan Marks of Manhattan, could not immediately be reached Tuesday for comment.