Giancana had gallbladder surgery in Texas ( Dr. Michael DeBakey) and probably could not eat spicy foods. He most likely had heart problems as well. These guys didn't take good care of themselves.

The most common theory that I've heard is Butch Blasi did the "dirty deed." Who knows for sure?" I do find it interesting that the law enforcement detail that was assigned to provide protection was recalled shortly before Giancana was murdered. Very odd to say the least.

Congressmen Frank Church and John Tower promised a full investigation into the death of Sam Giancana, but it never happened. Local authorities had trouble deciding who would take charge of the investigation. Long story short, not much of an investigation period.

I'll see if i can find some old newspaper articles about Giancana's murder.