As a student, scholar, and professional writer, I have long been familiar with the standards governing academic honesty and plagiarism. I applied these to many academic publications, including my master's and doctoral theses. I dealt with student plagiarism at various times in my professorial career (1967-1980), and later, as a speechwriter and corporate communicator, I applied these standards to ensure that the content of my work products, including professional articles, was either original or properly attributed.
It's not often that forensic linguistics makes the news. It's not nearly as sexy or yucky as the forensics that originates in the pathologist's lab or at the murder site.
When does a lawyer need a linguist? As Roger Shuy, one of the most pre-eminent forensic linguists, has observed, the interpretation and application of the law are overwhelmingly about language