Need biology Help with DNA fingerprinting!

In this gel lanes:  (Picture of properly prepared gel will be provided)

1. Standard
2. Blood found at the crime scene
3. Suspect 1
4. Suspect 2
5. Suspect 3

Based on what you have learned in lab, explain the process of DNA Fingerprinting, and how and why a gel like this one may be used to convict a criminal.  For full credit, be sure to explain how restriction endonucleases (enzymes) and gel electrophoresis work.