This 1995 file photo taken in West Palm Beach, Fla., and released by the FBI shows Francis P. "Cadillac Frank" Salemme. The former New England Mafia boss and and his co-defendant, Paul Weadick, were found guilty, Friday, June 22, 2018, in the 1993 killing nightclub owner Steven DiSarro. Each faces up to life in prison. (Photo: Federal Bureau of Investigation via AP, File)

A former boss of the New England La Cosa Nostra and an associate were found guilty of murdering a nightclub owner in 1993 for fear he would cooperate with federal authorities.

Francis “Cadillac Frank” Salemme, now 84, and associate Paul Weadick, 63, were convicted of a count of murder of a federal witness.

They were found guilty of the 25-year-old murder of Steven A. DiSarro, who managed a South Boston night club called The Channel.

Salemme and his son Francis P. Salemme Jr., had money invested in the club. As federal investigators closed in on the Salemmes, DiSarro’s connection to the boss was discovered—and authorities approached DiSarro.

Salemme Jr. and Weadick strangled DiSarro on May 10, 1993 in Salemme Sr.’s Sharon home.

The elder Salemme ordered the body removed out of state. They then transported the body to a property on Branch Avenue in Providence, R.I., where a clandestine grave was dug.

It was there, behind a mill, that federal investigators unearthed the remains of DiSarro in March 2016, according to court proceedings.

Salemme was the boss of the New England La Cosa Nostra in the early 1990s, until he was indicted for racketeering in 1995—a charge that resulted in a 1999 conviction.

For the DiSarro murder, he was convicted of obstruction of justice in 2008—before the body had even been found—for lying to authorities. He became involved in the Federal Witness Protection Program in the 1990s, was kicked out for attempting to pin the DiSarro homicide on another mobster, but then was later readmitted to government protection, according to local reporting.

Salemme was living under the name Richard Parker in Atlanta when he was arrested for the latest murder charge on Aug. 10, 2016—and Weadick was arrested three weeks later. (Salemme Jr. died in 1995).

The jury deliberated for four days last week. The major witness during the proceedings was Stephen “The Rifleman” Flemmi, Salemme’s former best friend, and a partner of James “Whitey” Bulger. Flemmi, who is serving life for a series of killings, testified he saw the younger Salemme strangling the nightclub owner, while Weadick held the victim’s feet.

Both Salemme and Weadick now face up to life in prison. Sentencing is scheduled for September.

“Today’s verdict ensures that both men will finally pay the price for killing Steven DiSarro in cold blood,” said Harold Shaw, the special agent in charge of the FBI’s Boston Field Office. “They took his life in order to ensure his silence.”