Do not confess to a crime you didn't commit. Ever.
I don't care if you've been in interrogation for HOURS. (You can leave any time you want if they haven't actually charged you with anything, or you can shut up and ask for a lawyer. Either one should stop the interrogation.)
I don't care if they promise you a light sentence or a recommendation to the DA or a puppy or a million dollars.
I don't care if they threaten you.
DO NOT confess to a crime you did not commit.
In case you're wondering, I just saw another true crime show where someone confessed to murder when they didn't do it.
Just don't. Ever.
(I looked the case up online. They did find the real killer. His DNA matched and he left his shoes with his name written inside them at the park where the body was discovered. He confessed, like he should've.)