To clarify: I'm not saying there were no abuses of the system in the old days. I'm only saying that it was not a foregone conclusion that a "signed confession" -- signed when there were no witnesses to testify to the circumstances -- would mean Bea Carroll was doomed to be convicted of murder after Superman had handed that "confession" to the governor.
Originally Posted by The Frozen Reptile
It occurs to me that, offhand, I'm far from sure on just what the law might have to say (in the 1930s, or more recently) about a person wanting to "revoke" a signed confession, or what "appeared to be" a signed confession.
I have the vague impression that this has been done, successfully, upon occasion, but I don't know what the process is or how much it takes to persuade a judge that the confession should not be introduced before the jury, during a criminal trial, as "valid evidence."