Criminal Riches

S1 E3: Four inventions connected to the wrong side of the law: two were created to stop thefts, one helped start a terrifying crime wave, and one came from the mind of a prisoner. We reveal the birth of the home burglar alarm, the cash register, the Tommy Gun, and the toothbrush. We show how these brilliant inventors found inspiration in the strangest of places, got assistance from unexpected sources, and made prototypes out of the most unlikely of items, in order to see their million-dollar dreams come to life.