SAUSALITO— An inmate who boasted of his mob connections is up for parole Tuesday, but Marin County prosecutors and relatives of his victims say the convicted killer should stay behind bars.

James Jacob Burggraf, 66, was convicted in 1992 of murdering three men in 1976 by shooting them in the head with a .22 Ruger equipped with a silencer. The execution-style murders — ostensibly so Burggraf could get the victims’ sizable cocaine stashes — shocked residents in tony Marin County.

Burggraf, then owner of Gatsby’s bar in Sausalito, was sentenced before the death penalty was reinstated in California. His three life sentences were merged, and Burggraf — who bragged that he had killed 29 people — became eligible for parole in seven years.

Beverly Bloch Savitt, the judge who sentenced Burggraf, said in 1992 he represented “everything reprehensible in society” and likened him to “a character in ‘The Godfather.”’

Chief Deputy District Attorney Kathryn Mitchell, who prosecuted the case, will appear before the parole board at Corcoran state prison Tuesday to ask officials to throw away the key.

“Burggraf was a brutal man without scruples, without morals, without conscience,” Mitchell said.

Burggraf was convicted of killing Sausalito musician Francis Smith, 32, and Guy Standish, 33, of Maui, Hawaii, purported to be a kingpin in the “Maui Wowi” marijuana trade.

Their bodies were found slumped together in a Tamalpais Valley motel room in May 1976. Authorities said Burggraf shot each man three or four times, taking a kilo of cocaine.

Burggraf was also convicted of the 1976 killing of Michael Venezia, 20. Burggraf allegedly tied Venezia’s body to anchors at Loch Lomond Marina in San Rafael, then tossed it into San Francisco Bay.