My son can't locate his friend. His friend lives and works in another state. His friend communicates by cell phone, email. My son hasn't heard from him in one month. Very unusual. His friend always calls his mother on his birthday but birthday came and went, no call. This person works alone, lives alone at employer's facilities. No way to contact employer, former address.

There is no way to locate someone without a name -- city , state -- Phone Number

His Name -- His Mom's Name -- Can You give us even one clue??

If you know where he works, call the local police and they can go and do a welfare check on them