50 CRIMINAL JUSTICE ■ Summer 2007 Bench Notes & Lab Reports John Willis was convicted of rape in 1992, despite his protests of innocence. At his trial, Dr. Pam Fish, a serologist in the Chicago Crime Lab, testified that her tests were “inconclusivve”i.e., that they had neither included nor excluded Willis as the source of semen. Willis, dubbed the “beauty shop rapist,” was convicted and sentenced to 100 years of imprisonment. Seven years later, he was exonerated by DNA testing. At that time, Fish...