How could I find information on Forensic Linguistics? ie what r the relations of Linguistics & police activity

Answer 1

So there is a little work out there, but not much. Roger Shuy has a great book called "Language Crimes - The Use and Abuse of Language Evidence in the Courtroom", covering various cases he's worked on. He uses the cases to illustrate the different types of linguistic interactions he's talking about - bribery, agreeing, threatening, etc. Nice passage titled "Misconceptions about Language in Law Cases".

Norman Fairclough has a book called "Language and Power" which, while not ostensibly about Forensic Lx, does examine the function of language in establishing, maintaining, and usurping power relations in various societies.

If you're looking for work, first get a linguistics degree. You could intern at a law practice while pursuing that degree, but you'll have more luck when you actually have the degree (M.A. or better, Ph.D.). Don't expect to make a living on it, though; the call for this type of expertise is not great. Still if you have a chance to do this sort of work, it can be tremendous fun.

Answer 2

I googled Forensic Linguistics and came up with the links below.
Wikipedia says, "Forensic linguistics is the name given to a number of sub-disciplines within applied linguistics, and which relate to the interface between language, the law and crime."
Alan Perlman (see link) says, "FORENSIC LINGUISTICS: The application of the principles and methods of linguistic analysis to the language of legal proceedings and documents.
Forensic Semantics: Analysis of and expert opinion on the meaning of words, phrases, clauses, paragraphs, etc., in legal, personal, and commercial communication (e.g., contracts, wills, cases of copyright infringement or plagiarism), whether paper, oral, or electronic.
Forensic Stylistics: Analysis of the syntax, style, word choice, spelling, punctuation, rhetorical strategies, and other features of anonymous, disputed, or forged communications (paper, oral, or electronic); expert opinion on authorship and/or characteristics of author."