I found this sentence on the first page of an A1 German text for language learners, and I'm stumped. I was hoping someone could explain the grammar of this sentence?
Ihn interessiert nur, was mit Verbrechen zu tun hat.
I understand that the second half is a dependent clause meaning something like "whatever has to do with breaking the law." But I don't understand the first half of this sentence. Where is the subject?
For context, the previous sentence reads:
Die meisten Mädchen finden ihn hübsch, aber das ist ihm egal.
Both of these sentences are about the main character Georg.