If someone you know has been arrested and you're concerned about their safety and potential mistreatment in police custody, you can submit an application to the SHO requesting a medical examination for the arrestee. While a doctor's note about an existing ailment might not compel the SHO to act, it could aid in a future bail application. The police are obligated to take the accused to the hospital if the SHO issues a medical certificate, but they cannot hold them beyond court orders.