" Ken used obfuscation. He kept random people’s DNA samples—hair, spare tissue, saliva, whatever—in Tupperware containers. Sometimes he found the samples in public restrooms, disgusting as that might sound. One very good spot was at summer camp. Many of the counselors used the disposable razors, which he could easily swipe. Urinals provided pubic hair. Showers gave you more. With "

― Harlan Coben , Stay Close