(NBC News) More details about the Boston Marathon bombing emerged Wednesday - two and a half weeks after the attack killed three people and wounded more than 200 - when two college friends of suspect Dzhokhar Tsarnaev were charged with removing a backpack and a laptop from his dorm room and another was charged with lying about it to the feds.
The laptop was turned over to the FBI, one of the friend's lawyer said, and a backpack containing deconstructed fireworks was ultimately recovered from a landfill. The friends also revealed that Tsarnaev has boasted that he knew how to make a bomb about a month before the attack.
Now, as the pool of evidence against Tsarnaev grows, so does the list of people related to or involved in the case. The friends - college classmates Azamat Tazhayakov, Dias Kadyrbayev, and Robel Phillipos - are only the most recent names to be added to a list that includes family members, a boxing coach, law enforcement officials, a car hijacking victim, a mechanic and of course the victims killed April 15: Martin Richard, Krystle Campbell and Lingzi Liu.