Just by the way, wyatt, I know literally 200+ lawyers in Toronto who could have done that defence attorney's cross examination just as well. And it was so rote and so easy, most of them would have done it word for word the same as he did. Ditto his submissions on the prosecutor's screw-ups.
As to why the ADA took the case, I assume that he was assigned it. Given the videotapes, he should have cut a deal or dropped the case the way the Chicago DA dropped the Michael Brown shooting case. But this stuff is more easily said than done and he likely wasn't allowed to make that decision.
The case was almost unwinnable for the prosecution, just going by the videotapes.