http://www.vox.com/2014/11/25/7287443/dorian-johnson-story
This article compares the stories told by Wilson (the officer) and Michael Brown's friend (Johnson). I personally can't help finding Johnson's account much more believable but either way, this much is absolutely true:
"Indeed, we might never get to the truth of what happened in those two minutes on August. But the point of a trial would have been to get us closer. We would have found out if everything we thought we knew about Brown was wrong, or if Wilson's story was flawed in important ways, or if key witnesses completely broke under pressure. We would have heard real cross-examination. We would have seen the strongest case that could be mounted by both the prosecution and the defense. But now we're not going to get that chance. We're just left with these Rashomon-like testimonies, a dead 18-year-old, and a shattered family."