The desperate 19-year-old suspect in the Boston Marathon terror bombings ran over his own wounded brother as he fled police, officials said. Considered armed and dangerous and possibly wearing a suicide vest, he remains on the loose, sought by legions of heavily armed police as nearly a million residents of Boston hunker down behind locked doors, in an unprecedented security measure.
The search for Dzhokhor A. Tsarnaev of Cambridge comes after a chaotic, violent night in which his brother died in a firefight with police, and one police officer was killed and another was seriously wounded.