Sometimes.
Sometimes it's to make sure the guy with money/connections walks.
That’s not the reason that our founding fathers indicated... :-)
You’re confusing the results that sometimes happens with the “reasons” why the founding fathers set up our system the way they did...
In fact, I believe that those founding fathers thought that it was *preferred* that some of the guilty possibly go free, rather than even *one* innocent person be convicted...
They realized that if you made it difficult for the “state” to convict people that this would mean that some guilty people would go free. But, if you made it so that you could *always* convict the guilty ones — that this would mean some of the innocent would be caught up in the process. They decided it was preferable that some guilty ones go free...
Yeah... Like Teddy Kennedy, the now liberal "Lion of the Senate!"