Uh, if a jury says not guilty...you are not guilty.
What you described is a failure of the justice system. If someone is guilty, the jury returns guilty. If they are innocent, they return innocent. This is merely a play to emotion and quite shallow. What would you change about our justice system? Should the jury not be allowed to issue a verdict in a rape or murder case?
It sounds as if you simply don't like lawyers or don't believe in our justice system. Are we throwing out that whole jury of your peers thing?
I might agree with you if juries actually heard ALL the evidence in every case.
If a police officer got somewhat overzealous in his pursuit of the truth... Let's say, for example, that an officer has no PC to search your vehicle but does so anyway. In the course of his search, he finds a dead body in the trunk and the knife that caused the wounds on that body in the back seat, complete with your fingerprints in blood on the hilt. Let's go out on a limb and say that there's even a signed confession to the crime next to the body, in your handwriting.
Obviously, the above is not only extreme but also wholly hypothetical, and I'm not at all defending illegal searches, but while none of that evidence would be admissible, it should be clear that the hypothetical "you" above is, in fact, guilty of the crime. Barring a body, murder weapon, confession, in fact any evidence at all, no jury could find the accused guilty, but that would not change the fact.
There was discussion during the OJ Simpson trial of evidence being excluded for a variety of reasons. As a result, his murder jury found him "not guilty" and there were many "jokes" about him being as innocent as money can buy.
I don't know that there is a solution to this situation, given the reasons why evidence can be excluded, but I think I've successfully demonstrated why a jury finding of "not guilty" is not the same thing as an accused being "innocent".
Blessings,
Bill