Yes, I do.
He makes it sound like the majority of people in prison are innocent.
That is only your inference. It is not the way I took it at all. He didn't say "prisons are filled". He said "prison cells are filled". And I believe that every prison in this nation has at least one prisoner who is innocent of the crime for which he is serving time. And an experienced criminal trial attorney would be able to tell you stories about guys he KNOWS are guilty and got off as well as guys that he KNOWS were innocent, but are doing the time.
I’m sure he did not intend to convey that there are a few percentage of people in jail who are innocent.
He was intentionally trying to paint the picture that there are tons of people in jail who are innocent - even the majority. Who, but a propagandist, would use words like “jail cells are filled with innocent people” to convey the reality that only a few percentage of cells have innocent people? I find that slight-of-hand wording a bit repulsive.
If you were to do a survey, I bet anything that the majority of people, who don’t parse every word, would interpret that statement as “jails being full of innocent people”.