BOSTON (AP) — Tamerlan Tsarnaev ranted at a neighbor about Islam and the United States. His younger brother, Dzhokhar, relished debating people on religion, “then crushing their beliefs with facts.” The older brother sought individual glory in the boxing ring, while the younger excelled as part of a team.

Tamerlan “swaggered” through the family home like a “man-of-the-house type,” one visitor recalls, while Dzhokhar seemed “very respectful and very obedient” to his mother. The brothers, now forever linked in the Boston Marathon bombing, in some ways seemed as different as siblings could be. But whatever drove them to allegedly set off two deadly pressure-cooker bombs, their uncle is certain Dzhokhar was not the one pulling the strings. “He’s not been understanding anything.

He’s a 19-year-old boy,” Ruslan Tsarni said of his brother’s youngest child, who was clinging to life in a Boston hospital Saturday after a gun battle with police. “He’s been absolutely wasted by his older brother. I mean, he used him. He used him for whatever he’s done. For what we see they’ve done, OK?”

Russia Alerted FBI About Tamela Tsamaev

The FBI came under fire from members of both parties Sunday as lawmakers questioned whether the bureau mishandled the case involving the deceased Boston Marathon bombing suspect Tamerlan Tsarnaev.

Several lawmakers said that considering Tsarnaev was already on the FBI’s radar, officials should have followed up with him after he traveled to Russia in 2012 for six months. The FBI had interviewed Tsarnaev in 2011 at the request of a foreign government. Tsarnaev’s application for U.S. citizenship was placed on hold after the interview, “raising questions about whether he could have been identified before carrying out the attack.”