(AP) - The 19-year-old charged with the Boston Marathon bombing, his throat injured by a gunshot wound, wrote down answers to the questions of investigators about his motives and connections to any terror networks.
Dzhokhar Tsarnaev's answers led them to believe he and his brother were motivated by a radical brand of Islam without major terror connections, said U.S. officials, who spoke on condition of anonymity because they were not authorized to discuss the investigation publicly.
But the written communication precluded back-and-forth exchanges often crucial to establishing key facts and meaning, said officials who cautioned they were still trying to verify what Tsarnaev told them and were poring over his telephone and online communications.
Tsarnaev was interrogated and charged Monday in his hospital room, where he was in serious condition with the throat wound and other injuries suffered during his attempted getaway. His brother, Tamerlan, 26, died Friday after a fierce gunbattle with police.
The charges came just hours before a memorial service for one of the three people killed in the bombings, 23-year-old Boston University graduate student Lu Lingzi, was held at the school and attended by hundreds of people, including Massachusetts Gov. Deval Patrick.