King said he's been told by authorities that video footage from the Lord and Taylor department store and from a local Boston television station has led investigators to believe that they have "clearly identified" the individual who placed one of the explosive devices at the site of the second explosion. The department store on Boylston Street is located near the site of the second explosion. It is unclear if the suspect is in custody.
Gov. Deval Patrick (D-MA) and Boston Mayor Thomas Menino (D) have both been briefed on the situation. King quoted sources who called the development a "game changer." A law enforcement official described the suspect as a "dark skin male," but King was hesitant to elaborate on that information.