- Prosecutors allege Azmat Tazhayakov helped dispose of Dzhokhar Tsarnaev's items
- Tazhayakov knew identity of bombers before the public, prosecutors said
- His lawyers said Tazhayakov did everything he could to assist the FBI
- They said statements from him during questioning were coerced
Boston (CNN)Prosecutors said Azmat Tazhayakov knew exactly what he was doing after the April 2013 Boston Marathon bombing when he helped his friend ditch a laptop and backpack that belonged to schoolmate Dzhokhar Tsarnaev. The assertions were made during opening statements of the first marathon bombing-related trial.