Dzhokhar A. Tsarnaev, 19, is identified as the surviving suspect in the Boston Marathon bombings and the person arrested in Friday's manhunt.
Tsarnaev's father said his son is an "angel" who was in medical school.
ABC News reported that Tsarnaev was believed to have assault rifles and an assortment of other weapons, including bombs. Authorities were concerned he might try to take hostages, ABC News reported.
Then, just before 9 p.m ET Boston police tweeted, "CAPTURED!!! The hunt is over. The search is done. The terror is over. And justice has won. Suspect in custody."
Dzhokhar Tsarnaev was registered as a student at the University of Massachusetts Dartmouth and lived in a dormitory there, according to other students. Students there said he was on campus this week after the bombings. The university closed down along with colleges around the Boston area as the search unfolded.
Dzhokhar Tsarnaev's page on the Russian social networking site Vkontakte says he attended Cambridge Rindge and Latin School, graduating in 2011, the year he won a $2,5000 scholarship from the city of Cambridge, which was celebrated with a reception at City Hall, according to a news release issued at the time.
Cambridge Rindge & Latin School is a highly regarded public school whose alumni include Matt Damon, Ben Affleck and NBA star Patrick Ewing.
Before moving to the United States, he attended School No. 1 in Makhachkala, the capital of Dagestan, a predominantly Muslim republic in Russia's North Caucasus that has become an epicenter of the Islamic insurgency that spilled over from Chechnya.
Online, he describes himself as speaking Chechen as well as English and Russian. His world view is described as "Islam" and he says his personal goal is "career and money."
Dzhokhar's father claims his son is a smart and accomplished young man.
Anzor Tsarnaev spoke with The Associated Press by telephone from the Russian city of Makhachkala.
"My son is a true angel," Anzor said. "Dzhokhar is a second-year medical student in the U.S. He is such an intelligent boy. We expected him to come on holidays here."
The other suspect, who wore a black hat in the photos released by the FBI, was identified as Dzhokhar's older brother, Tamerlan Tsarnaev.
Tamerlan Tsarnaev, formerly dubbed Suspect 1 by the FBI, was confirmed dead early Friday morning after a violent series of events.
Those overnight events included: An armed robbery in the Cambridge area, the fatal shooting of an MIT officer, a carjacking in the Cambridge area, and a chase and shootout in the Watertown area. In that second shootout, another officer was seriously wounded.
Dzhokhar Tsarnaev survived those events, escaped to become the focus of a massive, day-long search.
Learn more about Tamerlan: http://ch7ne.ws/ZBV1CO
Read more about the events that led police to the suspects: http://ch7ne.ws/YzaQdj
View a timeline of the hunt on your mobile device: http://ch7ne.ws/15rilKW