Requires certain police departments to establish a missing person's unit

HB 3138 requires police departments in counties with over one million residents to create a dedicated missing persons unit. This unit must coordinate missing person reports, enter data into state and national databases (MULES and NCIC), establish communication systems for missing persons information, and work with the state highway patrol's missing persons unit. Departments may hire new staff or reassign current employees for this unit, with costs covered by their regular operating budget. The bill directly affects large-county police departments and mandates specific operational procedures for handling missing persons cases.