The surveillance video with Dzhokhar Tsarnaev dropping his backpack in front of the Forum restaurant is the only piece of evidence presented by the prosecution to justify the accusation that he planted the second bomb. The video has never been made public, it is known only to the FBI, the Boston and MA police, the prosecution attourneys, the Grand Jury, and, remarkably, the defense. Despite this secrecy, enough details have been leaked meanwhile to formulate ten well founded theses leading to the interesting conclusion that the video doesn't prove Tsarnaev's guilt, but his innocence.
