Scientific evidence really nails this man to the wall, the Harris County, Texas prosecutor told the jurors in closing statements. At trial, George Rodriguez claimed he was innocent and that he had been working a factory the day of the crime. The prosecutor emphasized, however, that the blood type of swabs taken from the victim showed that Rodriguez did commit the crime and that a hair from the crime scene matched him. But seventeen years later, the same hair was tested again, this time using DNA analysis, and the evidence cleared Rodriguez and ultimately led to the crime crime lab being shut down and recreated. The Rodriguez case illustrates why the crime lab has entered a time of crisis. I will discuss that case and the larger story of th...