The documents, released to the Globe under the Freedom of Information Act, reveal that Mr. Tsarnaev, passed the test with only one incorrect answer, and that he also swore his allegiance to the United States and denied any links to terrorism.

Tsarnaev was killed in a firefight with law enforcement days after the April 15, 2013 bombings. He carried out the attacks, which killed three people and injured over 260, with his younger brother Dzhokhar. The younger Tsarnaev was arrested on April 19, and was sentenced to death last May.

The documents, while heavily redacted, have spurred further questions over whether immigration officials missed any potential warning signs during the application process. Tsarnaev began the process after a 178-day trip to his native Russia that federal investigators believe may have helped radicalize him, a trip that he disclosed to immigrations officials, according to the Globe. He also disclosed a 2009 arrest for assaulting a former girlfriend, and that he wanted to change his name to “Muaz,” an early Islamic scholar – a move that Russian officials had warned was a sign of radicalization.