The document summarizes the case of famous hacker Kevin Mitnick and his attack on computer security researcher Tsutomu Shimomura in 1994. It describes how Mitnick gained unauthorized access to Shimomura's systems, leaving taunting messages. Shimomura then worked with authorities to track Mitnick using log files and modified cellular technology. Mitnick was ultimately arrested in 1995 and charged with various computer crimes.