On April 18 , Phillipos went with Tazhayakov to Tsarnaev 's dormitory room , where he and Tazhayakov watched as Kadyrbayev searched through Tsarnaev 's belongings and found a backpack containing fireworks . Robel Phillipos convicted of lying to federal agents in Cambridge Marathon bombing probe . He is a friend of Boston Marathon bombing suspect Boston Marathon . Federal jury found another friend , Dias Kadyrbayev , guilty of obstructing justice . A third friend , Azamat Tazhayakov , pleaded guilty to conspiring to obstruct justice .
Robel Phillipos convicted of lying to federal agents in Cambridge Marathon bombing probe . He is a friend of Boston Marathon bombing suspect Boston Marathon . Federal jury found another friend , Dias Kadyrbayev , guilty of obstructing justice . A third friend , Azamat Tazhayakov , pleaded guilty to conspiring to obstruct justice .