~He was a Dallas nightclub (Stripper) owner. This gave him connections to the Mob.
~He died of lung cancer while in prison.
~No one knows what day Rudy was born. (Some do, but not confirmed)
~Jacob Rubenstein was his real name. He changed it to Jack Ruby, because he believed people wouldn’t do business with a person with a knowingly Jewish name. Plus, it game him a “street” name.
Here’s a site that gives you a complete run down of this shady character’s life.
The man was sort of a pimp in a way.