Bomb Suspects Now Mysterious to Those Who Thought They Knew Them

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Like any nervous 19-year-old, he was biting his nails.

Dzhokar Tsarnaev dropped into Gilberto Junior’s body shop at about 1 p.m. on April 16, the day after the bombing at the Boston Marathon, to pick up a white Mercedes E350 wagon. He said it was owned by his girlfriend.