Boston Leaders: Video Proves Black Suspect not Shot in Back

A knife-wielding black man killed while under surveillance by an anti-terror task force had discussed "committing beheadings" and "harming police officers," a law enforcement official said Wednesday. These details of the threat that prompted Boston police and FBI agents to confront Usaama Rahim on a sidewalk in Boston were described as authorities moved swiftly Wednesday to manage public perceptions of the shooting. Rahim's family is prominent among Muslims in Boston, where his mother is a nurse at Boston University. His older brother, Ibrahim Rahim, is a scholar known for preaching that violence is anti-Islamic after the Boston marathon bombings.