Audio problem: If you listen carefully to the conversation Kimble has with his lawyer, he says "St. Louis" differently in the live version and the police recording, indicating the crew may have used two different recordings.
Audio problem: When the cops are monitoring Kimble's phone call to his lawyer, Gerrard says, "That's a guy on a PA in the background", or something similar. During the actual phone call that Kimble makes, their is no PA audible in the scene at all.
Answer: It's a cold compress. You squeeze it, and the inner bag breaks mixing chemicals and it gets very cold. It helps to minimize swelling. He gave it to Kimball for all the bruises he had.
Grumpy Scot