Sources said the bombers had carjacked a Mercedes SUV, then used the driver’s ATM card to take out $800.

They drove to a Shell station, where Dzhokhar Tsarnaev grabbed a bunch of junk food while his brother waited outside, sources said.

“He was real calm, just browsing around. No emotion. He was calm like nothing happened,” said station owner Alan Mednick, who reviewed the security footage before handing it over to police.

Dzhokhar dropped the food — Red Bulls, chips and candy — when the owner caught him trying to shoplift.

That’s when the car owner ran to the Mobil and the bombers drove away.

From, of course, the New York Post.

H/T DJB