A pretty interesting article about a guy trying to find a network compromise - he actually did, knowing that there is close to no chance to find the criminal behind the attack.

By the way, the criminal only got access to two years worth of credit card transactions :-(

http://www.cio.com/article/114550/How_Online_Criminals_Make_Themselves_Tough_to_Find_Near_Impossible_to_Nab

Roger