Bruce Schneier has posted a link to a story about the German Police having an interesting time with DNA analysis of a series of murders due to a consistent false positive result; Bruce writes:

The German police spent years and millions of dollars tracking a mysterious killer whose DNA had been found at the scenes of six murders. Finally they realized they were tracking a worker at the factory that assembled the prepackaged swabs used for DNA testing.

I hope this gives pause for thought to those who think that programs like CSI reflect reality and that DNA profiling is always right..