Forensic linguistic

Forensic linguistics? I would like to deepen this knowledge. Forensic linguistics (or legal linguistics) is the application of linguistic knowledge and insights to the forensic context of law, language, crime investigation and judicial procedure. This branch of linguistics is very interesting. There are three areas of application for linguists who work in forensix contexts:
1) Understandig language of written law (it isn't so easy)
2) Understanding language use in forensic and judicial processes
3) the provision of linguistic evidence

So forensic linguistics covers all areas where language and law intersect. The concept first appeared in 1968 when a progessor of linguistics, Jan Svartvik, used it in an analysis of statements by T.J. Evans. In the 1980s, Australian linguistis discussed the application of linguistics to legal issues and they dispovered that a phrase such as 'the same language' is open to interpretation not only by lawyers but also by linguists.