Sign up for the MSNBC newsletter
You have been successfully added to our newsletter.
Let our news meet your inbox
Questions remain in FBI killing of triple murder suspect
Rachel Maddow reviews the history of an unsolved triple murder in Waltham, Massachusetts, believed to be connected to Boston Marathon bombing suspect Tamerlan Tsarnaev and another suspect, Ibragim Todashev, who was shot dead by federal agents while being questioned under circumstances that authorities are not being forthcoming about.