A nightclub owner who was allegedly killed in a Mafia slaying 25 years ago had left a 'distraught' note for his son saying it would be a while before they would see each other after he was called away to meet with a Boston mob boss.

Steven DiSarro, who ran the popular Boston nightclub The Channel, was allegedly strangled to death on May 10, 1993 at a home in Sharon, Massachusetts when he was 43.

His remains were found buried behind a mill in Providence, Rhode Island in 2016.

Former New England Mafia boss Francis 'Cadillac Frank' Salemme, now 84, and Paul Weadick, 62, are both charged in DiSarro's murder.

Steven DiSarro, who ran the popular Boston nightclub The Channel, was allegedly strangled to death on May 10, 1993 at a home in Sharon, Massachusetts when he was 43. He is pictured above with his son Steve Jr

Prosecutors plan to share details of the note DiSarro wrote before his death with the jury when Salemme and Weadick's murder trials get underway on April 24, the Boston Herald reports.

Former New England Mafia boss Francis 'Cadillac Frank' Salemme (above in a 1995 mugshot) was charged in DiSarro's murder after the victim's remains were uncovered in 2016

The victim was said to be 'extremely distraught' about meeting with Salemme, Assistant US Attorney Fred Wyshak Jr. said.

Salemme and Weadick, as well as the mob boss' late son Francis Salemme Jr., are accused of murdering the nightclub owner to stop him speaking to the FBI about his business dealings with the New England Mafia.

Salemme Jr., who later died in 1995, had previously worked for the victim at the nightclub.

DiSarro is believed to have been strangled in Salemme Jr.'s house while Salemme watched and Weadick held down the victim's legs.

The three mobsters were all silent partners in DiSarro's nightclub, WPRI reports.

Salemme's son had expressed concerns that DiSarro was stealing from them in the lead up to his murder and that he had started cooperating with the FBI.

Salemme, pictured above in the center in 1972, led the New England family of La Cosa Nostra in the early 1990s

Mobster Robert 'Bobby' DeLuca and his brother Joseph, who was allegedly inducted into the mob soon after the murder, are both set to testify at the trial.

Police alleged that Salemme later met Joseph DeLuca to transfer DiSarro's body into DeLuca's car so it could be disposed of.

Joseph and two others allegedly buried the body behind the mill, which was owned by DeLuca associate, William Ricci.

Ricci confessed to police that the body was buried on his property after he was arrested in 2015 in an unrelated case.

Salemme and Weadick were charged after investigators uncovered DiSarro's remains in March 2016.

Salemme led the New England family of La Cosa Nostra in the early 1990s.

Both of the accused deny playing roles in DiSarro's death.