Read This: ‘The Waltham Murders'

Susan Zalkind, author of “The Waltham Murders,” talks to Sue O’Connell about her book which she says covers a brutal triple homicide in Waltham, Massachusetts, that occurred in September 2011, eighteen months before the Boston Marathon bombings. Zalkind says marathon bomber Tamerlan Tsarnaev was best friends with one of the victims and claims he is ultimately responsible for those unsolved murders.