15/15. A few specks of grey paint help to solve two brutal axe murders, and a bungling burglar is caught when his DNA is found on a rock used to smash a window at one of his break-ins. Also in HD. [S]
14/15. A car hidden deep within a scrapper's yard unlocks the riddle of a suspected gangland shooting, and police secure the UK's first conviction for modern day slavery at a car wash. Also in HD. [S]
11/15. A hammer contaminated with the DNA of both victim and killer helps police solve a murder investigation, and a burglar is caught after photographing himself at the crime scene. Also in HD. [S]
10/15. A single 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. Also in HD. [S]
9/15. A USB stick with information about illegal drugs is found at a respectable businesswoman's house, and police crack down on the conversion of guns designed to fire blanks. Also in HD. [S]
8/15. A blood-spattered hammer is the key to charging the prime suspect in a murder case, and a drug gang is brought down when one detective focuses on how the product is packaged. Also in HD. [S]
7/15. A few spots of the victim's blood on a blue shirt convict a murderer, and a rapper incriminates himself when videos he posts online about his drug dealing are seen by the police. Also in HD. [S]
6/15. 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. Also in HD. [S]
4/15. A jacket recovered from a suspect's home has the DNA of two stabbing victims on it, and a fingerprint on a getaway car number plate snares an armed robber. Also in HD. [S]
3/15. A fingerprint on a fish and chips wrapper places a gunman in a rural location miles from his home, and a man's laptop reveals that he is behind a luxury gift card fraud. Also in HD. [S]
2/15. A hotel guest book gives police the names of an international drug smuggling network, and thieves who stole £20,000 of food from a factory are caught out by a car number plate. Also in HD. [S]
1/15. A fingerprint from an old break-in solves a murder at the same factory months later. Elsewhere, a DNA spray means police can finally apprehend a prolific motorbike thief. Also in HD. [S]
8/15. A vehicle's satnav puts a pair of prolific animal thieves behind bars, and an anonymous letter holds the key to the identity of a blackmailer on a mission to poison babies. Also in HD. [S]
7/15. A wedding video helps crack the case of a teenage abduction, and an expired pilot's licence exposes a fraudster flying under the radar. Also in HD. [S]
6/15. A scribbled name in a discarded notebook is the key to putting a dangerous driver behind bars, and the serial numbers on stolen bank notes crack the mystery of a dangerous gang. Also in HD. [S]
5/15. A plastic bag heat sealer convicts an online drug trafficker, and a casual chat with a criminal, plus a map, join the dots to catch three burglars terrorising a neighbourhood. Also in HD. [S]
4/15. How a single glove reveals the identities of a prolific and violent gang, and an image of a distinctive ponytail solves a hi-tech bank heist. Also in HD. [S]