During the Boston Marathon on April 15, two pressure cooker bombs exploded, killing 3 people and injuring an estimated 264 others. The suspects were identified as Dzhokhar and Tamerlan Tsarnaev after the FBI released photographs and survelliance video on April 18. The suspects then allegedly killed an MIT police officer, carjacked an vehicle, and initiated an exchange of gunfire with the police in Watertown, Mass. Tamerlan Tsarnaev was killed during the mayhem, but Dzhokhar, while injured, escaped. An unprecedented manhunt ensued on April 19. Later that evening, a Watertown resident discovered Dzhokhar Tsarnaev hiding in a boat in his backyard. Dzhokhar was charged on April 22, while still in the hospital, with use of a weapon of mass destruction and malicious destruction of property resulting in death. He has pleaded not guilty to 30 charges.
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