BBM
I don't see what that has to do with them changing their stories. No witness saw or heard GZ confront TM. No witness has a statement, whether initially or corrected that collaborates 'GZ tracked down and killed'. The one witness who saw two people running (which does not benefit GZ) backtracked on that. Are they changing their story because they really didn't see what they thought they saw or are they changing their story because they see how the case has exploded and what the public sentiment it?
If you are a witness, you report what you saw or heard. You then don't change your statement because you believe GZ tracked down and killed TM, despite the fact you never saw anything that preceded the confrontation.
Well, some did, but a witness with integrity doesn't