one thing that's sorta irking is that we have, or apparently have, 3 data points:
5:30 pm -- seen jogging
10:00 pm snapchat to BF
next AM, BF texts or messages GM and he says he checked a bit later and noticed that his message went unread.
Assuming both BF and Mollie were off work the night she goes missing, that is, Mollie's chilling at the house with the dogs and bf is hold up in his motel room or wherever in Dubuque--
did they not engage in any chat or text or phone calls btw her 5:30 pm jog and the 10 pm snapchat?
Maybe the boyfriend was still at work? Maybe he was driving from Brooklyn to Dubuque? Dunno.
fwiw, I agree that I don't think the BF has any involvement. It's just curious if the only conversation btw them the night she goes missing is her shapchatting him a pic.