What was the purpose of each step in the bullet/fingerprint analysis? And who is Melvin White?
Step by step: 1. Batman takes a piece of concrete containing all the pieces of the shattered bullet since that is what he will need at the end. 2. The gunshots were to test different bullet types in hopes of finding what type of bullet was used by (a) matching the hole size made in the concrete and (b) matching the wave patterns between the two blocks of concrete through sonar. 3. Once the bullet type was determined, Fox’s new type of sonar imaging was used in visualizing the bullet fragments and allowing them to be recombined to match the known bullet type. (a) Why the image could be gathered at the new Batcave but only be pieced together at Wayne Enterprises is unclear. (b) It is a plot point which allows the sonar device to resonate an image of a fingerprint since the oil found on someone’s skin would not be picked up that easily (or clearly) by a soundwave. 4. The fingerprint is matched to all possible suspects who have their fingerprints on file. 5. Of the four, the one they chose
