They reasonably believe that the person is a criminal trying to flee the scene of a crime; The person is impeding a legitimate police investigation or arrest. The main difference between the two is that false arrest requires an arrest, but, false imprisonment only requires unlawful detention.A false arrest is the unreasonable seizure of someone's personality. A seizure is considered unreasonable when there is a lack of probable cause to support it. False arrest is a crime that causes harm to an innocent party who can sue for damages in a civil lawsuit. We can provide you with samples of court forms that are available. • We can provide you with guidance on how to fill out forms. False arrest is an abuse of that power. False arrest is defined as the unlawful restraint of a person's freedom of movement. To file suit, you must fill out a Statement of Claim and Notice form.