Frank "Bomp" Bompensiero (October 29, 1905 – February 10, 1977) was a Sicilian-American mobster who was a longtime caporegime in the Los Angeles crime family.

Jimmy Fratianno, a close associate, once said that Bompensiero "had buried more bones than could be found in the brontosaurus room of the Museum of Natural History.

It was during his time in San Diego that Bompensiero got his start in organized crime by bootlegging alcohol coming over the border from Tijuana.

[4] Impressed with the young criminal, Dragna eventually made him a caporegime, placing him in charge of all of the L.A. family's interests in San Diego.

During this time Bompensiero was tabbed by Dragna as an extortion shakedown artist and hitman in San Diego and Los Angeles.

While Bompensiero was in prison, Mob boss Jack Dragna died of a heart attack and attorney and mobster Frank DeSimone took over the Los Angeles crime family.

DeSimone immediately demoted Bompensiero to soldier from caporegime, and appointed Tony Mirabile as the boss of San Diego.

Under intense pressure, with he and Fratianno in the El Centro jail, unable to make a high bail, Bompensiero agreed to become an undercover FBI informant, and the charges against him were eventually dropped.

In November 1975, acting as driver, Bompensiero helped Spilotro murder Tamara Rand, a multi millionaire real estate broker and investor from San Diego.

[2] At that time, Rand was suing Allen Glick, the mob front man in Las Vegas, to pay back a $2 million loan that she had made to him.

Spilotro carefully snuck into Rand's house as she was ready to have tea, and fatally shot her with a .22 caliber handgun, equipped with a silencer, while Bompensiero drove the murder getaway car.

A week later, on February 10, 1977, Frank Bompensiero was shot to death at close range with a silenced .22 caliber handgun while walking home after using a pay phone outside an Arco Station in the Pacific Beach neighborhood of San Diego.

In 1978, Fratianno told law enforcement that mob associate Thomas Ricciardi had killed Bompensiero in return for membership in the Los Angeles family.