The Music from the trailer is American Quartet - I Want a Girl. The song can be heard playing on a radio in the background when Waylon climbs down the attic's stairs in Vocational Block. Eddie Gluskin also sings the first half of the song while searching for the protagonist, with a small exception of replacing the word "boy" with "son".
The name Gluskin means philosophical, prophetic, and soul searching. Possible how Gluskin for his name