Forensic linguistics, aka legal linguistics speaks toward the usage of linguistic expertise, approaches and insights to the forensic perspective of the law, language, criminal investigation, and court procedure. It is a branch of applied linguistics, which identifies, explores, and provides answers to language-related everyday conundrums. Essentially, there are three areas of forensic linguistics:
Understanding the legal, written language of law
Understanding how language is used in forensic and legal procedures
The establishment of linguistic evidence