AdvertisementEarly Thinking: Boston Suspects Were Working On Their OwnApril 23, 2013Mark MemmottEyder PeraltafacebookEmailDzhokhar (at left) and Tamerlan Tsarnaev allegedly killed an MIT police officer, carjacked a vehicle and engaged in a gun battle with police soon after authorities distributed this image of the brothers walking near the finish line of the Boston Marathon just before two bombs exploded. Tamerlan, 26, died from injuries he received. Dzhokhar, 19, was captured Friday night. (FBI.gov)