This is from:
http://legalinsurrection.com/2013/07/zi ... rge//#moreA blog written by a criminal defense atty and seems to be the best source of refined info on the case:
At one point Serino was pressured to initiate a “challenge meeting” with Zimmerman, in which he would try to goad Zimmerman to making substantive changes to his testimony or to admit to a substantive omission from his prior testimony. The purpose of the “challenge meeting,” it was explained, is to try to break the suspects story and get to the truth. Indeed, the investigator might even pretend that some piece of incriminating evidence existed, or otherwise exaggerate evidence contrary to the suspect’s narrative, to try to find a chink in the suspect’s story.
The trouble, Serino recounted, is that he couldn’t really do an effective “challenge meeting” for the simple reason that “I just didn’t have much to challenge him WITH.” In this case, O’Mara asked, you didn’t have much to hit him with? “No sir,” answered Serino, “I did not.”
Nevertheless, the “challenge meeting” was held. In the absence of any real contrary evidence with which to challenge
Serino, the Investigator pretended to have some ready to spring. They had discovered, he said, video footage of the events that evening. “And what did Zimmerman say when you told him that?” “He said, Thank God,” Serino answered.
The last O’Mara question of the day, the last words the jury heard to take with them into the evening recess, could only be characterized as catastrophic for the State’s theory of the case. Looking directly at the man who had been the chief investigator on the case, who had possessed access to ever bit of evidence of any sort, who had interviewed, and re-interviewed, and re-re-interviewed–applying increasing from each interview to the next–O’Mara asked him:
“Do YOU think George Zimmerman was telling you the truth?”
Serino succinct answer: “Yes.”