Pima County Sheriff Chris Nanos has publicly defended the slow pace of the investigation into the disappearance of Nancy Guthrie, who has been missing for over four months. Nanos explained that the case relies heavily on complex forensic testing and legal procedures, which contribute to delays. He highlighted that the investigation is not simply about making quick arrests but ensuring that all scientific protocols are followed. DNA evidence collected from Guthrie’s home was initially sent to a private lab in Florida before being transferred to the FBI’s Quantico laboratory for more advanced analysis. The sheriff noted the challenges posed by mixed DNA samples, which complicate the investigation. Furthermore, Nanos stressed the importance of ensuring that forensic science not only identifies suspects but also exonerates innocent individuals. As the investigation continues, the FBI is considering deploying additional technological tools to help advance the case, with experts suggesting that technical solutions may be key to solving it. However, some, including attorney RJ Dreiling, have criticized the investigation's pace, calling for clearer communication from authorities.