A disturbingly large number of people have confessed to crimes they never committed. Always have a lawyer with you when being questioned by the cops. Cops are very good at wearing people down and getting them to say what they want them to say.
> Always have a lawyer with you when being questioned by the cops. <
Even better: Do not talk to the police at all. A great video on that here:
https://www.youtube.com/watch?v=d-7o9xYp7eE