It was under Graham v Connor case. Someone explained that the defense attorney made the jury think the officer tried to hide his use of force behind a smoke screen of clinical language and that he did so to minimize brutality. Also, law enforcement trainers use such jargon to make communication within the profession more concise and efficient. To make use of clinical-sounding terms, there are two reasons behind it 1. Is to make a precise description and 2. Different between trained and street fighting techniques.