(NECN: Scot Yount, Watertown, Mass.) - Heavy guard remains at the hospital where the lone surviving suspect in the Boston Marathon bombing is recovering from his injuries.
Once he is able to talk, investigators will have many questions.
The rein of terror that shut down the city, ended in a now famous boat in a Watertown back yard, just nine tenths of a mile from the spot where 26-year-old Tamerlan Tsarnaev died after being run over by his 19-year-old brother Dzhokhar as he fled from police.
The brothers allegedly killed an MIT police officer, carjacked an SUV and while being pursued, the suspected Boston Marathon bombers threw explosives at officers while in a fierce fire fight including what investigators believe was a pressure cooker bomb.
Authorities found what appeared to be the pressure cooker's lid embedded in a car.
Video from a state police helicopter showed the surviving brother before he was finally apprehended.
Tsarnaev could face a federal death penalty if he is charged with using a weapon of mass destruction.
At this point, he has not been charged, and the ACLU as well as a federal public defender have raised concerns about investigators' plans to question him without reading him his Miranda rights.
According to the Associated Press, an elite interrogation team will question the suspect because there is still a concern that the brothers might have planted bombs that may still go off.
The brothers are from Chechnya and, according to an FBI news release, a foreign government has said that the elder brother was a follower of radical Islam, and had planned to return to the Russia region to join unspecified underground groups.