Most of the time, I have to agree with you.
I used to have so much respect for law enforcement. I naively trusted the authorities --most especially cops, judges, and juries to come up with...well, justice.
But some nasty personal experiences (fortunately of relatively minor consequence for me and mine), and cases like this latest truly ABSURD indictment of David Evans, have soured me on our law enforcement and justice systems. (Thanks to Karl Rove for the word-of-the-day, "soured.")
All too often, police do not pursue real offenders, but rather innocent citizens who just happen to be convenient targets for ticket quotas; or much worse, innocent citizens who happen to be in the crosshairs of a prosecutor conducting a political witchhunt.
And I no longer trust courts --including judges and juries-- to pursue justice.
So instead of teaching my sons to look at police as friends of the innocent, or to our courts for justice, I've sadly had to teach them something very different.
And that is this: My sons, if you're stopped by authorities, for whatever reason, even if you're 100% innocent, don't volunteer any information.
There's too great a chance that --just as you say-- "Cops/prosecutors will twist, misconstrue, and lie about what you said to them if is serves their purpose. You don't talk to them and there is nothing to twist,misconstrue or lie about."
All too often, police do not pursue real offenders, but rather innocent citizens...
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It is more fun to go after people with something to lose rather than common criminals who consider jail time a cost of doing business.