Since timeline is so critical to figuring out how long BM's movements and whereabouts must be determined, I'm placing less reliability on Andy's repetition of something he heard elsewhere and more reliability on the fact that LE requested that residents retain any surveillance video recorded Friday, May 8 through Monday, May 12.
It's not that I don't believe Andy when he says he remembers being told someone saw SM at a sandwich shop Saturday; it's just that we don't know the source and reliability of that information and I think there are too many ways that information might have been determined, relayed, or remembered that are not reliable. For example, the sighting itself may have been unreliable (someone thinks they saw her, but is not positive or doesn't really know SM that well, so it could have been someone else), or the person who saw may have misremembered whether it was Thursday, Friday, or Saturday, or Andy himself might have mixed up which day in his memory. Early on, Andy reported that BM told him he'd been in Colorado Springs on the day SM was discovered missing, but we know from other reports that BM had been in Broomfield. In that case, we don't know if BM lied to Andy, or Andy misheard or somehow confused what BM said, or Andy misremembered what BM said.
BM notified the contractor in Indiana on Thurs, May 7 (the first day SM and BM woke up without the daughters in the house) that he was going to have a crew working on repairing the Broomfield wall early the next week. Yet, he opted not to mention it to MG until he contacted her in the early morning hours Sun, May 10 to ask her to get a crew together and meet him in Broomfield that evening so they'd be ready to start the wall repair the following morning. But, he was working with MG Saturday morning, so why not mention it to her then? Did he need to secure JP for the job first and didn't have certain agreement on that until he ran into JP in town on Saturday? If so, why not notify MG late Saturday so she could contact other crew members on Saturday and they'd all have a bit of notice to rearrange any other plans they'd made? At the very least, it's rude to impose last minute and on a Sunday and on Mother's Day as well. Why wait until the early morning hours on Sunday to inform MG?