> Not in the USA, since the 19th century but especially since Miranda v. Arizona

I'm not sure what you're trying to say here, because the problem did not abruptly vanish in 1966.

For example, Marty Tankleff, a then-teenager wrongfully convicted in 1990 for the murder of his parents. Even thought a defense lawyer arrived before Police lied to him that his father had named him as the attacker before falling unconscious, and even though a defense lawyer arrived before he could be tricked into signing a confession, the unsigned confession was still core to the prosecutions' case.