The Promise

Documentary about a compelling murder mystery, fuelled by a passionate young love affair. It all looked clear-cut when German student Jens Soering confessed to the brutal murder of his girlfriend's parents. But all was not as it seemed - by the time it came to trial, Jens was claiming he confessed to the murders to protect his beloved girlfriend, the beautiful Elizabeth Haysom - and that she had actually been the killer. (bbc.co.uk)