Leonard Snart was raised by an abusive father and took refuge with his grandfather, who worked in an ice truck. When his grandfather died, Snart grew tired of his father's abuse and set out to start a criminal career. Snart joined up with a group of small-time thieves and in planning out a robbery, each was issued a gun and a visor to protect their eyes against the flashes of gunfire. This visor design would later be adapted by Snart into his trademark costume. In recent years he has added a radio receiver to them which picks up the police band to monitor local law enforcement. Snart and the other thugs were captured by the Flash and imprisoned. Snart decided to go solo, but knew he had to do something about the local hero, the Flash. Snart read an article that theorized that the energy emissions of a cyclotron could interfere with the Flash's speed. He designed a weapon to harness that power and broke into a cyclotron lab, intending to use the device to charge up his experimental gun. As he was finishing his experiment, a security guard surprised Snart. Intending to use his gun only to scare the guard, he inadvertently pulled the trigger and discovered that his weapon had been altered in a way he had never imagined. The moisture in the air around the guard froze. Intrigued by this twist of fate, Snart donned a parka and the aforementioned visor and declared himself to be Captain Cold - the man who mastered absolute zero.