The issue was that Bao changed his testimony, informed Prosecution, but not Defense.
BDLR produced a piece of paper where he had written (note scribbled along margin ?) down (although it can’t be proven WHEN he wrote that note) that the witness had stated during REHEARSAL a time period of 1-3 minutes.
The Judge accepted that as proof BDLR didn’t know and that was why he didn’t tell Defense.
The Bao testimony seems like it could benefit from an entire article devoted to it.