Time: July 6 at 21.00 and the following 3 weeks
Station: BBC Radio 4 (can be heard on the Internet at the BBC website)
How long: 30 minutes
Textual Evidence
PDJames explores the emerging field of Forensic Linguistics. In a rare insight into the world of language, science and the law, this programme uses real-life criminal cases and actual police recordings to illustrate how linguistics and judicial procedure increasingly overlap.

More information here (scroll down).

(Thanks to Professor Malcolm Coulthard of the Forensic Linguistics mailing list)