Jobs in a missing persons unit in a law enforcement agency or police department involve collecting evidence and performing investigations to locate missing people. As a detective in this specialized area, you investigate reports of missing people, including suspected runaways and cases that involve a kidnapped person. Your duties and responsibilities include investigating the missing person’s last known movements, interviewing family and friends, and reviewing surveillance footage. Missing person investigators often coordinate with detectives and authorities in other jurisdictions and agencies. You may also coordinate with homicide detectives if you suspect that the missing person may be dead.