Tsarnaeva arrived in the U.S. in 2002, settling in a working-class section of Cambridge, Mass. With four children, Anzor and Zubeidat qualified for food stamps and were on and off public assistance benefits for years. The large family squeezed itself into a third-floor apartment.
Zubeidat took classes at the Catherine Hinds Institute of Esthetics, before becoming a state-licensed aesthetician. Anzor, who had studied law, fixed cars.
By some accounts, the family was tolerant.
Bethany Smith, a New Yorker who befriended Zubeidat's two daughters, said in an interview with Newsday that when she stayed with the family for a month in 2008 while she looked at colleges, she was welcomed even though she was Christian and had tattoos.
"I had nothing but love over there. They accepted me for who I was," Smith told the newspaper. "Their mother, Zubeidat, she considered me to be a part of the family. She called me her third daughter."
Zubeidat said she and Tamerlan began to turn more deeply into their Muslim faith about five years ago after being influenced by a family friend, named "Misha." The man, whose full name she didn't reveal, impressed her with a religious devotion that was far greater than her own, even though he was an ethnic Armenian who converted to Islam.
"I wasn't praying until he prayed in our house, so I just got really ashamed that I am not praying, being a Muslim, being born Muslim. I am not praying. Misha, who converted, was praying," she said.
By then, she had left her job at the day spa and was giving facials in her apartment. One client, Alyssa Kilzer, noticed the change when Tsarnaeva put on a head scarf before leaving the apartment.
"She had never worn a hijab while working at the spa previously, or inside the house, and I was really surprised," Kilzer wrote in a post on her blog. "She started to refuse to see boys that had gone through puberty, as she had consulted a religious figure and he had told her it was sacrilegious. She was often fasting."