Harold Kane

Harold Kane was a Biker and Criminal who had gained a speed-chemical, which allowed him to run as a speedster for short periods of time.

Life as the Hurricane
Harold Kane had already had a successful life as a criminal, which was assisted by his ability to speed. He was a biker, who's gang also helped him in his illegal activities.

Meeting the Flash
Harold arrived in Central City and took his guys to a bar. Upon cheating several locals, he and the guys leave once the police are called. He then leads his guys on a raid of the Gedde Natural History Museum. However both him and his gang are captured by the Flash.

Trivia

 * Harold is the first other Speedster The Flash meets.