A single fingerprint recovered from a fish and chips wrapper tossed on the ground is enough to place a gunman in a rural location miles from his home.
When police on a stakeout witness the shooting of their target, they quickly have to gather as much evidence as they can to find the men responsible.
Plus, a fraudster uses a victim's credit details to buy gift cards worth thousands of pounds to spend at luxury shops, until police trace him and find a treasure trove of evidence on his laptop.