I found the culprit! He must have been hiding out. I squished my game to post over here and when I went back in, this is what I found:
https://i.imgur.com/E3c7kwg.jpg
This is Erik's Obsessed Fan, Shea Butterfield. He's just standing there in the altogether in the foyer! Erik has small nephews and a toddler niece. Not so good that this guy got in.
This is Erik taking care of the problem:
https://i.imgur.com/qqwNGxD.jpg
This is the ousted Interloper and the Stan, is the blond Sim. I feel badly for blaming him, now:
https://i.imgur.com/3ZJtQ5k.jpg
