How does the fingerprint on the bullet work in Dark Knight?
I never entirely understood the scene where Bruce and Alfred shoot bullets into bricks and they figure out a finger print from it.
How does that technology work exactly?
Best Answer
If you're looking for a real-life application of this scene, I can't say with any certainty if this technology exists or is merely a plot device.
What I can tell you are the mechanics of this scene, however.
Upon arriving at the crime scene, Bruce sees a bullet hole fired into the brick of the apartment. While obtaining this evidence, he says to Gordon that he's going to obtain fingerprints off of the shattered bullet in the wall.
He then returns to the batcave to use a minigun filled with different ammo sizes in order to gauge what kind of bullet he loaded into the chamber, matching the impact of a control brick with the brick he obtained.
Using the information of the size of the bullet, he is able to digitally reconstruct the bullet, and run an analysis on it for fingerprints (The real stretch of this whole scene).
Using the fingerprint information, he is able to compare it to a criminal database of Gotham in order to determine the name of Melvin White (a known Joker alias for comic readers).
Pictures about "How does the fingerprint on the bullet work in Dark Knight?"
The Dark Knight - Bullet Scene
More answers regarding how does the fingerprint on the bullet work in Dark Knight?
Answer 2
The purpose of the test in the bunker was to determine how the particular type of bullet shatters when fired in to brick. With that knowledge, he was then able to digitally analyze the brick from the crime scene and reassemble the bullet and see the finger print.
Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.
Images: Aleksandar Pasaric, Pixabay, Tatiana Fet, Julyo Saenz