Salting Crime Scenes with Fake DNA Becomes Possible

When Dan Frumkin and his team recently announced they had finally discovered a way to clearly distinguish between natural and artificial (fake) DNA samples, not many people understood why their discovery generated so much interest in the international media. Read more at: http://www.islamonline.net/servlet/Satellite?c=Article_C&pagename=Zone-English-HealthScience%2FHSELayout&cid=1256910021588

Hal Warren was convicted of killing his wife, solely on DNA found at the crime scene, But he claimed he was innocent - right up to the time he hung himself in his prison cell.
If he did not commit the crime, who did? And where did the DNA evidence come from?