Their facial recognition software gave them some people that vaguely resembled the killer. They dug through their backgrounds and found a queer kid living in a youth hostel, someone estranged from their family. If you were going to pick an innocent person to pin this on, he's the classic type. Cops have been pinning unsolved crimes on drifters and other undesirables for centuries.

Want to know what I want to know? Where is Luigi's workshop? That's my question. How the hell do you print out, machine, refine, prototype, and build a 3D printed gun while living in homeless shelters and youth hostels?

Printing a gun is not like printing a page on a laser printer. It can be done, but it requires a long iterative process and a whole workshop worth of tools. If you want to convince me Luigi made a 3D printed gun, then you damn well better be able to show me his workshop.

So again. Where is Luigi's workshop?