If you wanna drag somebody to court in Zimbabwe for locking you up when they had no right to, the arrest's gotta be bogus. A cop needs a really good reason to put you in cuffs for it to be legit. Basically, an unlawful arrest is when they haul you off to jail for no justifiable cause.
When there's zero legal basis for throwing somebody behind bars, it's a major violation of their freedom and a huge injury. And if the folks holding you treat you nasty while you're in there, like torturing you or being cruel, you can sue them for that, too.
You've got options for who to take to court and get paid for an unlawful arrest and detention. It could be the police, other uniformed guys, or even a regular person. You can file your case in either...