The whole "innocent until proven guilty" entitles the accused to certain rights, but it doesn't mean everyone has to act like they are 100% definitely innocent.

The whole "innocent until proven guilty" entitles the accused to certain rights, but it doesn't mean everyone has to act like they are 100% definitely innocent. Taken to the extreme, that would mean you couldn't even arrest someone suspected to being a serial killer until they were convicted. Would make it a little difficult to make them stand trial...