Nessun
Nessun, aka Jason Michael Downey is an American hacker from Covington, Ky, and founder of the Rizon IRC network. He ran a botnet consisting of over 6000 compromised PC's to send spam emails and launch DDoS attacks, as well as administered the Yotta-Byte.net server, the alleged origin of a nasty variant of the Agobot worm. The worm disabled anti-virus protection and harvested software keys and user identification to sell on the black market.
On May 25, 2007 as part of Operation: Bot Roast, Downey was charged by the FBI with using a botnet in 2004 to launch Denial-of-service attacks against other computer networks, including rival IRC networks such as IRCHighway.
Downey was sentenced on October 23, 2007 to 12 months in prison and was ordered to pay $21,110 in damages to 3 companies that were affected by his DDoS attacks.