In general:
Yeah, turns out TeeVee crime shows are hilarious. They feature technology that no agency can afford or systems that don't exist.
Also: CSI grunts aren't James Bonds driving hummers, carrying Kimbers, and taking their $300 sunglasses off every 4 minutes.
...
Indirectly related to the topic of accuracy of forensics on TeeVee crime shows, reality, and public perception:
I'd recommend reading this study... it's interesting.