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Tamerlan Tsarnaev was one of two brothers responsible for the Boston Marathon bombing on April 15, 2013. The attack involved two homemade bombs detonated near the marathon's finish line, resulting in three deaths and over 260 injuries.

Following the bombing, Tamerlan and his younger brother, Dzhokhar Tsarnaev, were identified as suspects. A manhunt ensued, culminating in a shootout with police on April 19, 2013, during which Tamerlan Tsarnaev died. His brother, Dzhokhar, was apprehended, convicted of terrorism and other charges, and sentenced to death. Investigators found that the brothers had obtained bomb-making plans from an online al-Qaeda publication, suggesting they were self-radicalized.12

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