DNA evidence definitively excluded him as a suspect in one of the rapes, although both the victim and her fiancé continued to insist that Alexander was the perpetrator. Not all of the investigators were convinced of his guilt, particularly as three similar rapes occurred while Alexander was in police custody. In the case of one of the rapes that took place while he was in custody, Alexander's picture was accidentally placed in a photo-lineup shown to the victim. She selected his photograph as that of her assailant, despite his incarceration at the time of the offense.