Part VI of the seven-part series in the Los Angeles Times on the LAPD's Gangster Squad focuses on the murder of Jack Whalen by Mickey Cohen and his boys at a December 2, 1959 showdown at Rondelli's:
When the sun came up in the morning, one of the swarm of officers still at the scene searched through a trash can next door and discovered a plastic bag with three .38s in it. That was the moment another member of the Gangster Squad had been anticipating for a decade. Jack O'Mara got to Rondelli's while the body still lay there. When he heard what was in the trash, he told [Police Captain James] Hamilton, "Cap, they could be the guns I took." Hamilton remembered well how O'Mara had sneaked seven guns out of Mickey's house ages ago and etched initials under their butt plates in hopes of one day proving the man was a killer. The Gangster Squad had been trying to make that case, but failing, since 1946.
Six days after the shooting Sam Lo Cigno, at the urging of Mickey Cohen, surrendered to the LAPD as the man who shot Jack Whalen, and he claimed self-defense.