Tamerlan Tsarnaev kept a low profile during his visit to his family in Dagestan last summer, according to neighbours.
Tamerlan helped his father renovate his apartment next to a dentist is Makhachkala, speaking Russian with an American accent. Madina Abdulayeva described the 26-year-old:
"He was calm, intelligent, handsome, so fashionable. If you were to see him, you'd fall in love with him straight away.
"They say he was a fanatic. I didn't see that. We're all Muslim here. We're all part of Islam. We all pray."
Detectives in Boston are looking further afield as they piece together their case against Marathon suspect Dzohkhar Tsarnaev.
The uncle of Boston bombing suspect Tamerlan Tsarnaev described his recent visit to Dagestan in Russia and his great shock at the attacks.
Both men were enrolled in a school in Dagestan, a neighbouring region that was drawn into Chechnya's violence during the 1990s.