Frank Nitti (The Untouchables)

"I said that your friend died screaming like a stuck Irish pig."

Frank Nitti (real life Francesco Raffaele Nitto) is the secondary antagonist of The Untouchables.

Biography
Nitti is the psychopathic lead hitman of Al Capone.

Working for Capone
Nitti is first seen in a rival bar alongside Bowtie Driver, where he puts an explosive bag on a bench. The bar is soon destroyed, killing the bartender and a child. Nitti is later seen at a dinner at Capone's hotel, where he quietly watches his boss brutally beating a man with a baseball bat. Nitti is seen again near the Ness family residence, where he sadistically mocks Ness about his family.

Hunting the Untouchables
Nitti's first major appearance is when he, disguised as a police officer, sneaks into the Police headquarters. Entering the elevator alongside Oscar Wallace and George, he ruthlessly shoots both with a suppressed pistol. On his way out, he shots two other officers. Nitti later assists Bowtie Driver in the assassination of Jimmy Malone, where after Driver flees Malone's residence, Nitti guns Malone down with a Tommy Gun.

Final Stand
Nitti is present at Al Capone's trial, where he secretly brings a pistol. Eliot Ness then gets him out of the courthouse because of the gun. On the other room, Nitti reveals that he has a gun licence (signed by the corrupt mayor) and the guard consequently allows him to keep the gun. Ness then mocks Nitti when he sees that a paper in Nitti's pockets has the address of the late Jimmy Malone. The scared Nitti then points his gun at the guard and slowly goes to the exit. The guard then attempts to shoot Nitti, only to be shot dead by the hitman. Ness grabs the guard's revolver and tensely chases Nitti through the building, eventually cornering and subduing Nitti. Nitti then mocks Ness by saying that Malone died like a screaming Irish pig, which angers Ness. While Nitti is brushing his hair, Ness pushes Nitti off the building. And as Nitti falls screaming to his death, Ness shouts "Did he said anything like that!?".

Trivia

 * In real life, Nitti is a completely different person, though he is still a mobster.