I doubt he’s really 15.
This episode pushed up the discussion of testing all juvenile unaccompanied immigrant/migrant kids. The general feeling is that a minimum of one-third of those claiming to be this age...are a minimum of twenty years old.
Part of this issue is that Germany made it very easy to be accepted and given a visa....if you fell into the juvenile age group.
I expect by summer that some legislation is passed and mandatory age testing starts. Course, all of this has a cost to it, and you can figure it’ll take at least eighteen months to test and authenticate all of those in the country, and then determine how you toss out the failed non-juveniles.