Calley matches the .45 bullet pulled from the deaf girl to a gun registered to a man named Barry. The state of Florida does not register guns, nor do they keep a database of fired rounds from guns that have never been used in a crime.
After Boavista collects the motorcycle keychain, she throws it on to her clipboard in her hummer. As a CSI she should have placed the keychain in an envelope to maintain chain of custody and to keep it free of any possible contamination. She later gets upset when former CSI Wolf calls her on this oversight.