Depends on the prosecutor.
"Again, it was a dumb thing to say."
No it wasn't a dumb thing to say. He gave an example of what happens. Note the words "very easy", refers to process, not quantity. Next time, don't be so stupid.
So? Most people in prison are not innocent. Judging by the statistics from the The Innocence Project you are correct. I think that those found innocent are owed some major bucks for their time in prison.