who do i report an adult friend as missing to if i suspect foul play

To report a missing person, contact your local police department. You can call your local police department to report a missing person. Many city police departments also have websites with instructions on how to report a missing person. For instance, if you live in Mesa, you can go to the City of Mesa Police Department Missing Person's Unit. You can click on these links to get to the Tucson Police Department or the Phoenix Police Department.