Depends where you live
I heard about a guy in my country who admitted to have murdered someone
but the police couldn’t prove he did it - so he walked.
They then later found the real killer. the first guy “confessed” to it because he thought he didn’t have any other way out.
The police have to prove it - a confession can be unrealiable
at least where i live. in the US people are threatened with prison-time by the police, just to force a confession, so they can close the case and move on. Even though the police doesn’t throw people in prison… a judge does.
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