The older brother, Tamerlan, walked straight toward the cops but ran out of ammunition. He'd been wounded. An officer tackled him and police were handcuffing him when Dzhokhar tried to escape in the Mercedes. He aimed the car at the officers, who dove out of the way, and he ran over his brother. The Mercedes dragged the older brother down the street as it sped away.
The driver continued to exchange gunfire with police, then jumped out of the SUV and ran into the darkness.
Authorities finally got names to go with the photos and videos when they scanned a fingerprint from the brother left behind, according to The New York Times. He was Tamerlan Tsarnaev, and he was pronounced dead at a hospital. He was wearing explosives and a triggering device.
Police also learned that the Russian government had asked the FBI to check out Tamerlan's connections to radical Islamic groups in 2011. Nothing had come of the investigation.
Boston woke up Friday morning and learned the names of both bombing suspects. The manhunt for Dzhokhar Tsarnaev lasted all day and shut down much of Boston as police asked everyone to stay indoors. Authorities searched door-to-door in Watertown.
Then, in the evening, the request was lifted and authorities got a tip: A Watertown man told police someone was hiding in his boat in the backyard, bleeding. It was their suspect, the Watertown police chief said.
By then, there were a couple thousand police officers at the scene. A thermal image photograph, released Saturday by state police, showed what authorities say was Dzhokhar Tsarnaev lying in the middle of the boat.
"We know you're in there. Come out with your hands up," police demanded over a bullhorn.
Officers spotted Dzhokhar poking through the tarp and used "flash-bangs," devices meant to stun people with a loud noise. They used a robot to pull the tarp off the boat and negotiated with Dzhokhar for about half an hour.
Police, who had no idea whether he had explosives with him, repeatedly told him to stand up and lift his shirt and he eventually complied.
"Once we saw that, we felt comfortable enough to send some officer tactical equipment to grab him and pull him away from the boat," Deveau said.
The Boston Police Department got the last word on Twitter: "CAPTURED!!! The hunt is over. The search is done. The terror is over. And justice has won. Suspect in custody."
A few minutes later, a more somber tweet followed as Boston heaved a sigh of relief:
"In our time of rejoicing, let us not forget the families of Martin Richard, Lingzi Ly, Krystle Campbell and Officer Sean Collier."