Is this guy a catfish?

Supposed guy interested in my mil
Supposed guy interested in my mil

Supposedly the same guy with his kids
Supposedly the same guy with his kids

I could be wrong but these two pictures to me seem like different men. My mother in law has been talking to this guy online. She even gave him her address & I’m worried she’s going to end up robbed or murdered by some stranger.
How do I search to see if he’s fake?
Is this guy a catfish?
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