Wilson is guilty of bad police work, not murder.

[Donald Ian Rankin]

22. A trial is *not* what you have "to find out the truth".

A criminal trial is what you have after the prosecutors have decided that they are certain enough someone is guilty that they have a good chance of convincing a jury that they are guilty "beyond all reasonable doubt".

And even if you viewed a trial an investigative tool, it wouldn't tell you if the suspect was innocent or guilty - the verdicts a jury can return are "guilty beyond all reasonable doubt" and "there is reasonable doubt of guilt", not "guilty" or "innocent".

A criminal trial is not a substitute for an enquiry or investigation, it's an prelude to punishment. The way the criminal justice system works is that you only try someone if you're pretty certain they're guilty - very trials end in acquittals, not because they system is rigged, but because the cases where acquittal is likely don't get prosecuted.

By all means argue that Wilson is almost certainly guilty, and should therefore be tried and convicted. But arguing for a trial as a way of finding out the truth is either misguided or disingenuous.