Ambiguity works. This is a highly succesful shot of this versatile actor because of its versatility. Any label will work here, "kind dad", "best friend of hero", "suspect in murder investigation".
We don't know quite what's going on here with this man and it's that mystery which makes the photograph interesting. It also makes it stand out from other photographs where the message is more obvious.
We don't know what to make of him, we want to know more. That's good.