The siblings of Boston mobster James “Whitey” Bulger say they are heirs to his estate, and their legal case could play out in Suffolk Probate Court.

Bulger’s brother, who served as president of both the state Senate and the University of Massachusetts, his brother and their three sisters have declared themselves the beneficiaries of an estate that currently is worthless, according to court filings.

But a wrongful death suit planned against the federal government could change its worth.

Bulger, who was 89, was serving a life sentence after being convicted of 11 murders at the U.S. Penitentiary Hazelton in West Virginia when he was murdered in his cell on Oct. 30, 2018. The cause of death was blunt force injuries.

That case will be aimed at the federal prison system for transferring wheelchair-bound Whitey Bulger from Florida to West Virginia, where he was beaten to death just hours after being placed in the general population.

A planned wrongful death and negligence suit against the federal government will contend the government was liable for his death for transferring him to the West Virginia prison. He was killed hours after officials placed him in the general prison population.

Relatives of the victims, however, said they will challenge for their share of any monies that could be awarded to the estate.

One man, whose sister is alleged to have been a victim of Bulger, said Bulger’s family shouldn’t profit.

“They can put in all the claims they want but it ain’t gonna happen,” the brother told the Boston Herald. “All the money should be divided up between the families of all his victims.”

He added: “My mother filed the first lawsuit against Bulger and her attorneys are watching this.”

This undoubtedly is a unique case. It will involve many facets of the law, including estate law, and will be fascinating to watch as it progresses through the court system.