When Jane Harrison went missing in 1995, the search was fruitless and the case closed three months later - but 17 years on, new evidence revealed shocking truths.

Actress Joanna Scanlan examines the huge task facing police and prosecutors as they try get justice for families and prove a murder has happened without a body.

Actress Joanna Scanlan examines the huge task facing police and prosecutors as they try get justice for families and prove a murder has happened without a body.