Alleged Boston Marathon bomber Tamerlan Tsarnaev had literature in his home about government conspiracy theories, mass killings and white supremacy all because to an older gentleman who introduced him to the respective topics, revealed Monday by BBC.

The network program Panorama reported on the reading material authorities found in Tsarnaev's apartment. There were magazines that sympathized with Hitler - saying he "had a point" - promoted a white supremacist agenda, and outlined how mass murderers successfully carried out their crimes calmly. Tsarnaev subscribed to publications promoting white supremacy and government conspiracy theories, according to the report.

Tamerlan Called Him Mother Hours Before He Was Killed and Sounded 'Alarmed'

He owned articles which argued that both 9/11 and the 1995 Oklahoma City bombing were government conspiracies. Another one in his possession was about "the rape of our gun rights."

The Wall Street Journal on Tuesday identified the individual who gave the literature to Tsarnaev as 67-year-old Donald Larking. He was a client of Tsarnaev's mother, Zubeidat Tsarnaev, who worked in the U.S. caring for the elderly. Larking had disabilities after surviving being shot in the face during a robbery 40 years ago. He and Tamerlan spent time together when Zubeidat was not available for work, according to The Atlantic Wire. Their relationship grew even stronger when Tamerlan started bringing Larkin to his mosque regularly, reportedly just to get him out of the house.

After the bombings at the Boston Marathon on April 15, which killed three people and injured over 200 others, Larkin called authorities when he recognized images of the Tsarnaev brothers from media reports. Now, months after the massacre, Larkin has reportedly "sunken into anger and depression" and believes the Boston bombings were a conspiracy. 

Tamerlan and his younger brother, Dzhokhar, are accused of planted two bombs near the finish line of the Boston Marathon held in April. Dzhokhar was captured on April 19 following a shootout with police, in which Tamerlan was killed. On July 10, Dzokhar pleaded not guilty to 30 federal counts. If the government decides to seek capital punishment, he could face the death penalty if convicted on one of 17 counts. 

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