what common person will do ??

If a police officer assaults you without justification, you have several recourse options. You can lodge a written complaint with their superiors, up to the SSP, or potentially file a court complaint, though this can be difficult. Prosecuting an officer requires government sanction, which is often hard to obtain. While powerful individuals might face fewer obstacles, ordinary citizens may find the process challenging. For women, involving women's organisations or the media can sometimes lead to action.