The incident happened around 7 a.m. on Rest Church Road in northern Frederick County.
The purchases were made using credit cards from a missing wallet, Montgomery investigators say.
The iconic building was closed Thursday because of electrical problems that affected the elevator.
Police said the shooting took place early Friday.
Three schools closed because of the water problems in the Shaw and Logan Circle neighborhoods.
Workers are repairing a broken elevator.
Matthew Jamaal Brown has been charged with three counts of robbery in the recent thefts.
A fire in the basement of an apartment building led to the road closure.
Riders should expect delays because of an earlier train malfunction