Right wrt to the father. But they will still need to address it. I would argue that a grieving father pursuing justice for his son might err in the opposite direction, if anything.
That said, the first part of my post was about getting 100% expert agreement that it was not George yelling. Imo, that will never happen. Even putting aside the percentage match the Sentinal's expert gave. If the FBI says it was Trayvon, I would give it a better chance that no expert will contradict. But based on the investigator's testimony at the bond hearing, it doesn't sound to ME like that is the case. jmo