This is a story about genetic differences in different tissues. Could this cause problems for DNA testing in criminal cases? I've sometimes wondered about how reliable it is. Some criminals have been set free despite really strong evidence against them and I wonder if there has been some sort of DNA testing flaw.
http://www.sciencedaily.com/releases/2009/07/090715131449.htm
http://www.sciencedaily.com/releases/2009/07/090715131449.htm
