Wow, you're getting really worked up...
You can not absolutely trust anyone, including cops and judges. This is why everything should be handled by multiple people with verifiable paper trail and other kinds of documents. One person has a somewhat high probability of being a crook, ten unrelated people recording and documenting the search would have to be a part of enormous conspiracy to be all crooks. Trustworthiness of evidence should not be evaluated by judging the honesty of one person.
This is a mess of unrelated statements that don't seem to have much bearing on your conclusion. But anyway,
Everything should "be handled by multiple people with verifiable paper trail and other kinds of documents", but how do you treat evidence that isn't handled this way? And saying something should happen is weak, anyway. People should tell the truth.
Ten unrelated people in this situation are actually related. They're all cops. You don't need a lap cat or a smoky room to make a conspiracy. The fact that cops hesitate to report on or testify against each other is fairly well established.
And finally, the trustworthiness of evidence should absolutely "be evaluated by judging the honesty of one person"! You're familiar with the analogy of the chain and the weakest link?
No. All it does is follow the ridiculous "Let's weaken the government so we won't have to improve it" A.K.A. "Government should not be more powerful than rich people". What is the root of the problem.
The government is a tool wielded by the rich. Why are you so anxious to sharpen that tool?