To the criminal element it matters a great deal. There are good and bad times to commit a crime. A bad time would be at 6:00PM with many cars in the parking lot.
A good time would be at 12:30 in the morning with presumably one car in the parking lot. I woudn't be surprised if these clowns were casing this place or at least were familiar with the comings and goings of the people in the building.
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