For me, it's not that he should have known for sure, it's that he should have just kept his dipshit mouth shut about it. As a multibillionaire he has the ability to hire a PI or maybe even directly call the police chief or some shit and then comment about it like a near-omniscient memelord ("using his powers for good" or something).

Instead it's just an immediate dumbass comment to his millions of whatever pops into his head at that exact moment.