Didn't Casey have a radio in her cell? Didn't Casey also get an hour a day to watch tv? If both of those are true then Casey did have first hand knowledge/access to news reports concerning her case.
Good point. Forgot she did have a radio at some point. The potentially relevant question, though, is whether or not she saw TV coverage of ZG before she spoke to CA on July 25. She wasn't asked about this during the depo. Thinking that means its either not important enough to pursue, or, the answer is already known and will be used against her, or, its known and is not relevant.