February 21, 2007: Voice message from Teresa Halbach used as evidence in court

From the FOX6 News Steven Avery archive:

The Steven Avery trial took a bit of an unusual turn on February 21, 2007 -- when a voice message from Teresa Halbach was entered into evidence in the case. What was on that message -- and why was the message brought forth? FOX6's Peter Linton-Smith picks up the story.