I'm not sure if you're speaking from a point of naivety, but the only point at which the presumption of innocence enters into the justice process is when you step into a courtroom.
Everything prior to that - in all your interactions with police, jails, prosecutors, before your day in court, they will all presume guilt, and will treat you like the criminal scumbag that they think you are.
Oh, and most defendants never even get their day in court.
Everything prior to that - in all your interactions with police, jails, prosecutors, before your day in court, they will all presume guilt, and will treat you like the criminal scumbag that they think you are.
Oh, and most defendants never even get their day in court.