It's nothing short of amazing to me how rampant coerced confessions are--it's not something I gave any weight to until the last few years where I've seen some pretty heinous examples of it (best one being the teen in Making a Murderer.).
You're right, it's not about justice or getting the right person in this country, it's about getting somebody, anybody to take the rap so we can feel that justice has been served.
That's pretty disturbing.