Episode 15—Series 3

15/15 A few specks of grey paint help to solve two brutal axe murders.

Episode 1—Series 3

1/15 A fingerprint from an old break-in solves a murder at the same factory months later.

2/15 A hotel guest book gives police the names of an international drug smuggling network.

3/15 A single fingerprint on a fish and chips wrapper places a gunman in a rural location.

4/15 A jacket recovered from a suspect鈥檚 home has the DNA of two stabbing victims on it.

5/15 Fingerprints found after a break-in and brutal beating lead detectives to a murderer.

6/15 Blood spatters found on a trench coat link a callous killer to the murder of a pensioner.

12/15 Coded information in a spreadsheet reveals the perpetrator of a campaign of blackmail.

8/15 A blood-spattered hammer is the key to charging the prime suspect in a murder case.

9/15 A USB stick with information about illegal drugs is found at a businesswoman鈥檚 house.