The Crime Scene At School

After the lockdown, all the students returned back to their school. A Gentleman appeared and declared himself as their new principal. He said that their ex-principal has been transferred but the reality was that the gentleman wanted to be the principal so he killed the ex-principal and hid the deadbody in the backhall and warned everyone not to visit there because an investigation is going on there. But something happens and everyone knew his real identity and he was out to jail.