He said this during the photo shoot with Hirn: "I don't have a single American friend. I don't understand them."
And in 2009, Tamerlan, then 22, was arrested for domestic assault and battery after allegedly assaulting his girlfriend, according to Cambridge Police records cited by the website spotcrime.com.
'I cried ... when they named him'
Dzhokar, however, apparently did have several friends. Torrie Martinez, 20, was one of them.
Friday, Martinez stood on Cambridge Street looking down Norfolk Street where the Tsarnaev brothers made their home. Martinez used to catch the city bus with Dzhokar every day to school and was on the wrestling team with him.
"I wish I could say he was a bad kid," said Martinez, still trying to absorb the news. "But he was a nice kid from what I knew of him. I talked with him on a daily basis. I practiced with him."
He was a sophomore when he met Dzhokar, who was a year behind him. They talked about stuff high school boys talk about; it never got too personal. Martinez didn't know Dzhokar was Chechen.
And they talked wrestling. "He was a smaller kid, but he did well for his weight class," Martinez said.
A smile appears beneath his scruffy, unshaven face.
"Between me and him, I would pin him."
Now he wished he'd whupped him a little harder. The smile vanishes from Martinez's face.
"I cried ... when they named him."
It will be hard to trust anyone again.
Larry Aaronson, a former teacher at Cambridge Rindge & Latin, said he had taken pictures of Dzhokar wrestling.
"There is nothing in his character, in his deportment, in his demeanor that would suggest anything remotely capable of any of these things that he is now suspected of doing," Aaronson said.
"He was so grateful to be here, he was so grateful to be at the school," he said. "He was compassionate, he was caring, he was jovial."
He described Dzhokar, whom he saw in the neighborhood nestled between Harvard and MIT a few weeks ago, as "a lovely, lovely kid."
Construction worker Joey Barbaso, 50, has lived in the neighborhood since he was 5. His pants are worn from hard work and stained from years of paint. That's the kind of people who live here -- along with college students.
"It's just, I dunno," he said. "You never know who you're living next to."
Robin Young, host of radio's "Here and Now," said Dzhokar was her nephew's best friend. She called him a beautiful boy.