I read this story long ago in news. Probably about a foreign country.
A girl was trapped in a room by rapist. The girl quickly took photo of rapist and emailed it instantly.
Then he talked with rapist and said, ” Look, I have already sent your photo by email to police…. Now if you will do anything to me, you will be caught..”
The rapist had to let go her.
A mobile phone with camera and email id of police, saved her life.