Before taking such shots on a person instead of the issue, you should always at least Google...
Michael Seringhaus [i]s a third-year student at Yale Law School, where he serves as an executive editor of the Yale Journal of Law and Technology (YJoLT) and a co-director of the Green Haven Prison Project, as well as the Trumbull College Graduate Affiliate Coordinator. He completed his PhD and a short post-doc in Mark Gerstein's bioinformatics group in the Department of Molecular Biophysics and Biochemistry at Yale University in 2007. He did his undergraduate work at Trinity College, University of Toronto and thereafter spent a year as lead bioinformatics scientist at Affinium Pharmaceuticals in Toronto.
Looks like he may have the credentials (one of the top law schools, editor of a law journal on law & tech, and... a PhD in bioinformatics) to at least get past your initial objection.
As to your other objection, and I'm not saying I agree with his central thesis, there are other factors that would likely eliminate the false positive issue (esp. if it's upwards of 1:1,000,000,000) - physical location (if your passport says you were out of the country when the crime occurred, surveillance tape has you at a retail store across town, etc.), other physical evidence at the crime scene, etc.
I should probably concede that there's that extremely distant chance that your DNA doppelganger could live in the same neighborhood, frequent the same social circles, and commit a crime in which you have no alibi and there's no other evidence aside from some trace DNA. That would be a real bummer.
Organic chemistry is the chemistry of carbon compounds. Biochemistry is the study of carbon compounds that crawl. -- Mike Adams