It started just as it was getting dark on Friday -- armored vehicles and police with assault weapons moved in on Boston Marathon suspect Dzhokhar Tsarnaev. Media are reporting that the 19-year-old is a live and now in police custody<br/> <br />Many in the Boston suburb of Watertown reported hearing gun shots as the operation began.<br/> <br />Police will now focus on interrogating him about the explosion and possible links to violent groups.<br/> <br />This image released by FBI earlier in the day shows him purchasing Red Bull energy drinks at a local convenience store ahead of the shootout that killed his brother.
