EsnRedshirt, That was the part I left out on purpose, since I was talking specifically about the print image. Prints ARE being left, as they are wiping across other body parts (face/neck) where they are picking up oils. Once they started seeing duplicate prints of individuals that are currently locked away, they compared analysis of the body oils and determined they were from separate sources. A formal paper on this is being worked on and will be published later this quarter in one of the police bulletins. I am sure some of the news outlets that deal with weird tech will be carrying the story around that time(slashdot.org, etc.) This is all statement of fact, not something hypothetical. - Ray