The famous Miranda warning – “you have the right to remain silent…” — is actually very difficult to understand, especially for non-native speakers, who often give up their rights without knowing what they are.
Perhaps 25% of the cases I handle involve the authorship of anonymous, disputed, or forged documents. The client wants to know who's writing those nasty, threatening emails or letters. I typically ask the client for writing samples from the suspected author. Sometimes there's more than one suspect, and I have to decide which of them may be the author of the anonymous document(s).
A forensic linguist must be exquisitely sensitive to nuances of text. Where a synonym exists, the very choice of each word represents a decision on the part of the author. Superimposed upon that is the way the word is spelled, abbreviated or capitalized. Truly, a text is a tangle of choices.