The only hearsay exception I can think of that would allow her friends' statements (which were not contemporaneous, as I recall) is the excited utterence exception - but it would be hard to demonstrate that Broaddrick was "excited" much more than 12 hrs. or so after the event.
IIRC I think it was that very evening she made statements to her friends and/or relatives, and when they observed her physical condition.
If you wanted to look into it some of the old articles describing what and when she reportedly said and to whom, they are probably in the FR archives.
This might make an interesting case to consider the application of the "excited utterance" exception with your evidence professor and your friends.