The meaning and relevance of this courtroom drama movie's title Physical Evidence (1989) is that it is a legal term that refers to evidence that is of the form of a physical object that is used to prove a fact, the proving in issue derived from the object's demonstrable physical characteristics. Physical Evidence can be the whole or just a part of a physical object.
Second and final theatrical feature for director Michael Crichton where the movie was not a science-fiction or fantasy genre piece. The first was The Great Train Robbery (1978).
When this movie ceased to going to be a sequel to Jagged Edge (1985), Glenn Close's character from that movie was no longer going to be called Teddy Barnes. Her character name became Jennifer Hudson / Jenny Hudson.