Killer at the Crime Scene

A body found in a ditch by a dog walker in 2013 became the first in a series of dead bodies discovered, kick-starting a police investigation to track down a serial killer.

A carer discovers a vulnerable man dead in his bedroom, surrounded by blood spatter. CSIs immediately search for evidence, but are confronted with signs of a thorough clean-up.

A decomposing human corpse is found in a suitcase dumped on a country lane in Yorkshire. The investigation's first clue is the distinctively patterned tape used to bind the victim.

Forensic teams investigate the murder of a teenage girl in her own home, and discover that the killer has attempted to cover their tracks by making it look like suicide.

Officers respond to reports of violent disorder in a south London residential street involving a large group wielding axes, knives and lumps of wood, attacking cars and people.

Only yards away from her Rochdale home, 65-year-old Eileen Jawczak is found brutally murdered. But despite an extensive forensic recovery, CSIs cannot uncover any promising leads.

After a brutally murdered oil rig worker is found in a burnt-out car, the quiet Scottish town soon becomes inflamed with rumours and fear.

A university lecturer is found stabbed to death in the middle of a park. Just moments later, a report comes in of a second non-fatal stabbing, less than a mile away.

A landlord discovers a foot poking out of his wheelie bin, outside a property that has just received an end-of-tenancy deep-clean that may have destroyed any evidence.

A boy survives being stabbed in the heart by a stranger. While surgeons try to remove the broken blade, detectives analyse CCTV footage and search for witnesses to the attack.