I’m pretty sure this Judge will rule the lies are not material, and admit the testimony.
The way things are going, the judge will probably accept testimony from Al Sharpton: “I saw that white KKK dude murder that poor kid with my own eyes!”
For an example - think back to the woman who was an eyewitness to OJ Simpson in the white Bronco making abrupt traffic maneuvers at a point between the murder scene and his home, moments after the murders are believed to have taken place. She accepted $5,000 from a tabloid television program for an interview weeks after the murders, and with that, was never even called by the prosecution. Her credibility was considered vulnerable because she took money for her story.
Here, it's not a matter of vulnerability it is simple truthfulness. This explains why the stand your ground hearing request was withdrawn. The time to drop this bomb is at trial.