Establishes "Preston's Law" which establishes standards of conduct for law enforcement officers when conducting homicide investigations

HB 3459, known as "Preston's Law," requires law enforcement officers to interact with families of homicide victims using respect, empathy, and trauma-informed communication during investigations. The bill mandates that officers avoid victim-blaming or judgmental remarks, protect family privacy, and provide specific information within set timeframes - such as family verification within 24 hours, autopsy reports within 9-12 months, and victim resources within 48 hours. It also establishes annual training for officers on cultural sensitivity and family engagement, and creates a complaint process with the POST commission for violations, which may result in retraining or disciplinary action. The law directly affects law enforcement personnel conducting homicides and the families of homicide victims.