Witness: Police changed my testimony

It has gone largely unnoticed that on March 13th, ABC News that a witness (long-time teacher) told a police officer that a teen  (Trayvon Martin) cried for help in a struggle with a man (Zimmerman). The police office responded by correcting the witness, stating that it was Zimmerman, not Trayvon Martin, who cried for help. Link to ABC News story.