A fingerprint left behind during a previous break-in solves the brutal murder of a security guard at the same food factory months later. Elsewhere, a DNA spray means police can finally apprehend a prolific motorbike thief.
A hotel guest book provides police with the names of an international drug smuggling network. A gang of thieves who stole £20,000 of food from a factory are caught out by a discarded car number plate left near an abandoned trailer.
A single fingerprint found on a fish and chips wrapper tossed on the ground places a gunman in a rural location miles from his home. A man's laptop reveals that he is behind a luxury gift card fraud.
A jacket recovered from a suspect's home has the DNA of two stabbing victims on it as police hunt for the person behind a series of seemingly unprovoked attacks. A fingerprint on a getaway car number plate snares an armed robber.
Fingerprints found after a break-in and brutal beating are enough to convict a man of murder, and crooks who burgled a man's home and started using his credit card are caught by CCTV.
Blood spatters found on a trench coat belonging to a suspect in an unrelated case of armed robbery links a callous killer to the murder of a wealthy pensioner. A detective proves a light aircraft that crashed was too heavy for take-off.
A few spots of the victim's blood on a blue shirt convict a murderer. A rapper incriminates himself when videos he posts online about his drug dealing are seen by the police.
A blood-spattered hammer is the key to charging the prime suspect in a murder case. A drug gang is brought down when one detective focuses on how the product is packaged to catch the men at the top.
A USB stick with information about the production and supply of illegal drugs is found at a respectable businesswoman's house. Police crack down on the conversion of guns designed to fire blanks.
One piece of paper found on top of a hidden fax machine gives police the number of a shipping container used to smuggle millions of pounds' worth of drugs from Thailand. A cheque for a mattress links a killer to a body found at a stadium.
A claw hammer recovered from a bin and contaminated with the DNA of both victim and killer helps police solve a murder investigation. A burglar is caught after photographing himself at the crime scene.
A man is linked to a series of murders at music venues by a shoelace with his final victim's DNA on it. Coded information buried within a spreadsheet reveals the perpetrator of a campaign of blackmail.
An ice pick used t stab a man in the head in the street is recovered from the roof of a pub and brings a murderer to justice. An anonymous letter throws suspicion on a man who may be storing and manufacturing guns.
A car hidden deep within a scrapyard unlocks the riddle of a suspected gangland shooting at a remote location. Police secure the UK's first conviction for modern day slavery at a car wash after a phone is shown to have tracked a minibus.
A few tiny specks of grey paint help to solve two brutal axe murders that have been baffling police. A bungling burglar is caught when his DNA is found on a rock used to smash a window at one of his break-ins.
