The July 23, 2012, issue of the New Yorker magazine has a very good article about forensic linguistics, the use of linguistic tools in the legal system. The article, titled “Words on Trial,” was especially interesting to me. The first two linguists mentioned in the article, Robert Leonard and James Fitzgerald, were my Forensic Linguistics professors at Hofstra University. And the article describes some of the cases I discuss in my own classes and presentations about forensic linguistics.

The full article is behind a paywall, but you can read a summary here.
http://www.newyorker.com/reporting/2012/07/23/120723fa_fact_hitt