The fatal stabbing of a Nottingham teenager is investigated by a digital forensics unit using cutting-edge tech to track the four culprits' digital footprints.

The brutal murder of a man in a Scottish nature reserve is investigated by the specialist forensics cops using ground-breaking techniques to identify possible suspects

The murder of a 13-year-old in a local park is investigated by the Digital Forensics Unit as they track the suspects' digital footprints