Then on Thursday, the FBI gave a startling presentation and made an extraordinary request: Here are photos videos of two suspects; these are being distributed worldwide, and we want to hear from anybody who knows anything.
The two – Suspect No. 1 (in the dark cap) and Suspect No. 2 (in the white cap) – were later identified as brothers Tamerlan Tsarnaev, 26, and Dzhokhar Tsarnaev, 19, from Chechnya.
After fatally shooting a campus police officer and hijacking a car, the two late Thursday and early Friday led police on a wild chase that involved throwing improved explosive devices from their speeding car. In the ensuing shootout, police killed Tamerlan, but Dzhokhar eluded them. A massive manhunt all but shut Boston down, and Friday the wounded suspect was finally captured.
From tragic start to rapidly unfolding denouement, it was a stunning week.