"She’d actually seen Rivera at family gatherings in the weeks after Tibbetts disappearance, she said,
and the case was even a topic of discussion."
Details Continue to Emerge in Mollie Tibbetts Murder Case – Rolling Stone
SHUT THE FRONT DOOR!!! I wonder if he commented anything at those gatherings
ETA - apparently he did ......
“[Rivera] would comment as well and we would all say that we were surprised and scared because this is a quiet town,” said the aunt, who declined to provide her name. “He never displayed signs for us to suspect that he had anything to do with this.”