Firearms officers from West Midlands Police receive a tip-off about a local man with an unexpected arsenal of firearms. Inside a bedroom wardrobe they find six guns, two of which they believe are 3D-printed assault weapons. The 30-year-old resident is arrested and taken into custody, but he has no criminal record and no obvious links to organised crime, leaving police teams to ask whether he is an extremist, an arms dealer or simply a gun collector, as he claims to be. Is he creating these guns to use them, and could he have used them already?