Vanished: The Missing Surrey Schoolgirl

A Surrey schoolgirl disappeared on her way to school and was never seen again, until a retired counter-terrorism officer living nearby decided the old case file did not add up. His informal re-investigation, done alongside the journalist who first covered the story, turns up witnesses the original inquiry never found.

Why it's free: Real Stories is Little Dot Studios' own documentary channel, which produced this film through Below The Radar.