The Moment of Proof

A yacht is tracked by police as a gang uses it to smuggle weapons into Britain.

A discarded cigarette butt helps catch the murderers of a young father.

An airport hire car helps bring a pair of international hitmen to justice after a private investigator is murdered.

A train ticket and a chance encounter help hunt down a pair of international fraudsters.

A blood-stained shopping trolley holds the key to solving an assault.

A drug boss is put behind bars because of a paper trail from his dodgy property empire; an observant cashier helps convict a fraudster.

A mobile phone hidden in a bundle of clothes helps save a young woman from a forced marriage.

Stained banknotes hold the key to tracking down a bank robber; hidden camera footage.

A packet of wet wipes helps convict a driver responsible for a deadly hit-and-run.

A travel card holds the key to convicting an offender following a spate of random stabbings.

A spent bullet casing holds the key to bringing two murderers to justice; a hire car helps track down a thief.

A thief that prowls for victims on social media is locked up, thanks to the sheath of his knife.

A plot to extort thousands of pounds from a casino is foiled, thanks to a high-stakes sting operation.

An elderly murderer is convicted after a cat-and-mouse chase with armed police; a fraudster is locked up.

A car key helps crack a criminal conspiracy to steal luxury car parts; a torch provides the proof needed to convict.