MOSCOW, February 29 (RAPSI) – Tamerlan Tsarnaev, a man responsible for organizing the Boston Marathon bombings in 2013, has been suspected of being connected to terrorism shortly before the tragedy, the Boston Globe reported on Monday.

According to the newspaper, Tsarnaev’s federal immigration records are heavily edited and leave many questions on why exactly Tsarnaev and his friend Ibragim Todashev, who was killed during interrogation by an FBI agent, were granted legal residency in the U.S.

Tsarnaev and Todashev were involved in suspicious and criminal behavior on the U.S. soil. Yet, after some delays, both men were given legal residency in the country.

Tsarnaev passed a U.S. citizenship test three months before the Boston Marathon Bombings. He denied all allegations of terrorism at the time.

U.S. Citizenship and Immigration Services (USCIS) claims that Tsarnaev and Todashev’s cases were handled correctly.

On the afternoon of April 15, 2013, two explosions occurred near the finish line of the Boston Marathon. IEDs devised from pressure cookers, low explosive powder, shrapnel, adhesive, and other materials were hidden in backpacks that were then placed near metal barricades in areas packed with hundreds of spectators.

Tamerlan’s brother, Dzokhar Tsarnaev, was arrested following a dramatic manhunt during which Tamerlan was killed, as was MIT Police Officer Sean Collier. Tsarnaev was charged on April 21 with the use of a weapon of mass destruction and malicious destruction of property resulting in death.

Tsarnaev was found guilty on all charges on April 8, 2015. He was officially sentenced to death on June 24, 2015. Tsarnaev has spoken for the first time during the trial on that day admitting his guilt and asking for forgiveness.