Some of it is odd, but I figured it was a robbery that went south after they took the opportunity to rape them. I assumed they decided to run after killing the one lady..that's the only part I found strange - why they left the one lady alive. I did think it was strange it was Lulewhatever, 'cause if you're gonna go big and rob a place why not Apple? Honestly, I was surprised it is an inside job! lol
I didn't think it strange for the manger to return to the store for an employee's forgotten wallet.
If the manager only had they key, then obviously the employee would need to ask the manager to be let back in. I agree that when it's closing time for stores, lights would still be on and people about (esp. w/ Apple releasing iPad 2.0).
Yet, the manager is closing out the registers, so there's the money aspect. Store robberies and general crimes happen at all times with people around or not.
I worked retail and another store wouldn't let a customer buy something w/ a check b/c they didn't have an id. The doors were locked until the customer returned with their id, so they let them back in for purchase. The person robbed the store - all at a busy shopping area and roadway with bright lights at about 9:15 pm. (no ski masks though...maybe that was a clue in her story - criminals blend in busy areas...)
Generally in retail when an employee leaves for break or home, the manager checks their bag/purse, even a flash of the inside of a coat (or you can't put it on until you leave) to look for stolen merchandise. And if you bought something, they look in the shopping bag and look at the receipt to match items.
Perhaps she brought back to the manager to tell her to keep her mouth shut about the stolen goods? When she left I guess she went to get her big knife? Geez, poor, poor woman she killed.
Wonder why she moved the car though. I guess so it wouldn't be so easy to locate her car once someone noticed she didn't return home? Stupid if you are using the "we were robbed" story.