Two days after that attack, on April 17, Kadyrbayev told law enforcement officers that he drove to Tsarnaev's dormitory room on the campus of their southern Massachusetts school and texted to his friend to come down to meet him.

CNN: SHARE THIS

The two-story complex includes a school and a dormitory that housed about 70 children, many of them orphans, who were asleep.

WSJ: Mosque Fire Kills 13 Children in Myanmar, Fueling Suspicions