Emergency blip and missing medicines.

Kept forgetting to take a photo hence this emergency blip through our (closed) bedroom window.
We went shopping at Tesco and had prescriptions to collect for both of us. They said mine was not there which was odd as I ordered it Wednesday. However, they found it but didn't have enough calcium tablets and no gaviscon. They returned the prescription for the gaviscon to the spine so I could try elsewhere. Terry's medication was all OK.
Terry popped the prescription packs in the carrier bag which holds all the other bags and it was hanging securely on the handle of our trolley. 
We finished our shopping and loaded the car boot. I took the trolley to the trolley bay which was close to where we'd parked. 
Off to Boots and got gaviscon.
Quick call in Asda on the way home because we needed 2 items.
Unpacked shopping and Terry realised the carrier bag with our prescriptions and some other shopping bags was not in his car. We remembered loading the boot and neither of recalled the bag with the medication.
I can't see how I did not see it hanging on the trolley but it can be the only explanation as it couldn't fall off. We rang Tesco pharmacy and nothing had been handed in and she checked if anything was handed in to Customer Services but it hadn't. We even nipped to Tesco to see if we could spot it in the trolley bay even though we knew it was very unlikely.
Therefore, someone has taken our bag with the contents. There were 6 items in my prescription bag, a month's supply of each. There were 3 items in Terry's, 2 months supply of each. These are all medications which are essential. I usually order more than this but I did not need my inhalers this month as they last longer than a month.
Why would someone keep these? Don't they think we might have needed them?
We have reordered but the point is that I find less and less to like about the human race in general these days.