Investigating cheating incidents

Student cheats in remote asynch class, I try to schedule meeting to discuss, system tells me he's in a different time zone although home address is just up the road and he lives on campus.

What the heck? Have any of you seen this before? What was going on then? Is it connected to the cheating?

FWIW he's in and out of the course at normal times. Have not checked IP addresses yet.

(My settings are correct--first thing I checked.)