Why Walgreens?
Pain meds I would think. Many pills sell for $5-$10 each on the street... you snag a container of 500... that's $2,500 - $5,000.
They didn't hit the pharmacy, looks like. If they had, the cops would have had every one of them rounded up by now. They are on video!
You know, every checkout counter in every store I ever worked in had a panic button under the counter that was connected directly to the police station in case the store was robbed. I realize the kids aren't in there very long, but if only whoever was in the office could remotely lock the front doors and push the panic button, the kids would be caught inside until the police arrived. Yeah, they might break a few things while they were waiting, but it would sure send a message to kids who think this is all funny and shit.
My family ran a small general store for about seventy years, and when high school let out each afternoon, something of a flash mob (a WHITE one, btw) descended and managed to pocket quite a few Twinkies and Clark bars. Retail businesses do not operate on a high profit margin. Especially little Mom&Pops are hurt with shoplifting. And in a chain store like Walgreens? We all pay, in higher prices to make up for the loss.