Please help me hire a PI

My brother went missing on January 13, 2016. No one he was living with called me or my family when they went up to his work to pick him up but he "disappeared" at 12 in the morning. I am hoping to hire a private investigator seeing as how me filing a missing persons did nothing but put him into the system. They won't go looking because "he's an adult" he hasn't touched his bank account, he didn't pack a bag, he wouldn't just walk away from his job. Please help us find him. Please!!!