When a Bonanno crime family associate disrespected Michael Souza over a financial dispute, he had to pay.

Mr. Souza, who ran a dangerous Colombo mob crew on Staten Island, decided to launch a surprise attack, or a Jack in the Box, to take out the Bonanno associate, prosecutors said. He acquired a gun silencer for the crime but never got a chance to use it, they said.

On Tuesday, federal agents said they silenced Mr. Souza and 10 of his crew members, arresting them on charges of racketeering, robbery, assault, weapon possession, loansharking, gambling and drug dealing.

The arrests came after federal prosecutors unsealed a lengthy indictment that alleged Michael Angelo Mr. Souza, a made man in the Colombo organized crime family, ran the brazen crew with his brother, Anthony “Ant” Mr. Souza.

The indictment, the result of an eight-month DEA investigation, said the crew committed the crimes between January 2004 and November 2006. Agents obtained evidence against the men through wiretap interceptions.

In one of those federal recordings, Mr. Souza boasted about his violent past.

“I beat people up with chairs, barstools,” Mr. Souza said in the recording. “I cut a guy’s eye out of his head with a wine glass.”

As part of the same investigation, federal authorities said they charged an Albanian mobster, Lulzim Kupa, in a separate indictment with conspiracy to distribute marijuana.

All 12 men were arraigned Tuesday in Brooklyn federal court. They pleaded not guilty, a court spokesman said.