London-based Sarah Bax Horton has spent years researching London's most infamous serial killer, Jack the Ripper... His killing spree - targeting women - started in 1888. Over the decades many people have been suggested - but the killer was never caught, even though, apparently, a prime suspect was known to police and investigated. Sarah Bax Horton identifies the man she thinks carried out the crimes, backed by detailed evidence. "MURDER DETAILS INCLUDED - LISTENER DISCRETION ADVISED*