Right, but if I understand the vague time line correctly, this co-worker/friend informed the wife about this sighting right away and the wife then started calling Robert on his cell, with no answer. That's the coincidence that I was referring to. If she did see him on the road and that's not unusual, I think it's very coincidental that this particular day the friend/co-worker thought enough of it to alert the wife right away. It implies, to me, that the friend knew Robert's routine well enough to know that the time and location of her sighting of Robert was worth a call. Maybe it all happened just as they claim and I'm much less aware of the work details of my friends/co-worker's partners than most... Or, maybe, the friend and the wife were very close and normally talked in the morning when one was en-route to work and one was at home. Or, maybe the phone call from the friend/co-worker about seeing Bob didn't happen until later than the current reports make it appear... Lots of fuzziness still, 3 weeks later...
Wish there were more firm details and a clearer sequence of events. Especially interested in knowing exactly when Robert was reported missing.