<<No, stupid statement..........."But that is exactly what you just don't seem to understand. It is not necessary for them to find out what the truth is.". So, now you're backpedaling on the notion that the Police don't look for the truth in a crime and in who they're investigating?? >>
I did not say they don't LOOK for the truth - - those are your words. I said, it is NOT NECESSARY for them to FIND the truth.
Nobody trusts them to find the truth. All they have to do is assemble what looks to them like a good case to take to the DA, who then decides whether to bring it before the court. Naturally they do their best in presenting the case to make it as close to the truth as they can, particularly as regards the identity of the perp, but they are not expected to come up with THE TRUTH. The truth is for the court to determine, not the cops. If they put together the best case they could with what facts and logic they had, and the court throws out the charges, this is not (except in cases of egregious error or malfeasance) the fault of the cops, whose job was not to find the truth but to put together the likeliest case, so the court would have a good shot at finding the truth based on the evidence assembled.