[yurka]

If he wants to be missing, there might not be much you can do. If you know where he lives, you can find someone in the area to knock on his door and check if he's there. In some cases you can also call the non-emergency line of the local police and ask for a "welfare check" where they will drop by and check on the person. If the family suspects something is wrong, they can file a missing persons report with the police.