Bulger, 89, found himself not responding on October 30 at US Penitentiary Hazelton in West Virginia, one day after being transferred there.
His injuries occurred when he became “the assailant of others,” the document says. The approximate time between the commencement of his injuries and death is listed as “minutes”.
The authorities did not pronounce Bulger’s death until 9:04, the death certificate says.
Bulger, who eluded federal government for more than 16 years before his arrest in June 2011, served the rest of his life in prison for a litany of crimes that included his role in 11 murders.
In November 2013, he was sentenced to two living conditions plus five years after being an architect of a criminal company who, in the words of a federal judge, committed “unimaginable” acts of terrorizing a city.
A federal jury sent Bulger the 31st financial year, including racketeering, extortion, money laundering, drug trafficking and weapons possession.
The jury found him guilty of 11 murders from 1973 to 1985.