DNA testing found not to be 100% accurate in Germany, how will this affect cases in the U.S.

The murderer dubbed "The Phantom of Heilbronn" had been baffling German investigators for two years. The criminal was a rarity, a female serial killer, and a very busy one: Police had linked DNA evidence from 40 crimes — including the famous homicide of a policewoman in the southern German town of Heilbronn — to the same woman.
The police thought they'd been looking everywhere. But it turns out they should have been looking down — at the cotton swabs they were using to collect DNA samples. On March 26, German police revealed that the cotton swabs they use may have all been contaminated by the same worker at a factory in Austria — and that the Phantom of Heilbronn never existed.
It wasn't until earlier this year that investigators figured something had to be very wrong. Trying to establish the identity of a burned corpse found in 2002, they were re-examining the fingerprints of a male asylum seeker taken from his asylum application made many years earlier. The fingerprints contained the Phantom's female DNA. Impossible, they thought, so they repeated the test with a different cotton swab — and this time found no trace of the Phantom's DNA.
This raised suspicions that the DNA found at all the Phantom's crime scenes might be traced to a single innocent factory worker, probably employed to package the swabs. Cotton swabs are sterilized before being used to collect DNA samples, but while sterilizing removes bacteria, viruses and fungi, it does not destroy DNA. (Read a TIME cover story on DNA.)


Link: http://www.time.com/time/world/article/0,8599,1888126,00.html