Geographic profiling pioneer Kim Rossmo has been likened to Sherlock Holmes;
his Watson in the hunt for serial killers is a digital sidekick -- an algorithm he calls Rigel.
Until he was called in on the Beltway Sniper investigation, Detective Kim Rossmo's most confounding case was the South Side Rapist. For almost a decade, an unknown assailant,
his face bandit-wrapped in a scarf, had been stalking women in quiet Lafayette, Louisiana, and then assaulting them in their homes. He remained at large in 1998 when Rossmo, then