What's It Like Opening Your Mail and Finding Dead Roaches?

It's a good day for Mark Stoeckle if he gets a roach in the mail. For the past year, Stoeckle, a DNA identification expert at Rockefeller University, and high school student Joyce Xia have run the National Cockroach Project out of an insect lab at Rockefeller. We talked to Stoeckle about the gross-out factor.