Wow. Remember what I’ve been saying, forensic scientists are human beings, and therefor unfortunately fallible. Apparently if you work for the FBI, you get fired for being human.
At a hearing Friday, attorneys revealed the FBI analyst mistakenly contaminated the evidence with some of her own DNA. She has since been fired.

Ingmar Guandique — Defendant
Maybe it was only because this is a “high profile case”, the Chandra Levy case. High profile cases can get real political. As a crime lab employee it is best to avoid these types of cases if at all possible. If you do a really GREAT job, the head of your law enforcement agency will get a great pat on the back. If you screw something up, you-know-what always rolls downhill, and you are going to be eating a Shinola sandwich.
A bit harsh, but read the whole article here at Fox News.