Law enforcement officials are conducting a massive manhunt for 19-year-old Dzhokhar A. Tsarnaev, the second suspect in Monday’s Boston Marathon bombings. His older brother, Tamerlan Tsarnaev, died earlier in a confrontation with police.

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We’ve rounded up comments and remembrances of Dzhokhar Tsarnaev — who was also known as “Jahar” — as told to The Washington Post by people who knew him.

● “He was one of those people you could confide in and he always offered help — do you need food? are you hungry? — like a friend would do,” said Pamala Rolon, who was his residential adviser in the dorm where he lived at UMass-Dartmouth.

● “He was a fairly popular kid; he was a fairly friendly, nice kid,” said Ty Barros, 21, a former classmate of the suspect at Cambridge Rindge & Latin, a public high school in Cambridge. “I liked his personality.”

● “If someone were to ask me what the kid was like, I would say he had a heart of gold. He was as gracious as possible,” Larry Aaronson, a former teacher at Cambridge Rindge & Latin, told the Boston Globe.

● Robin Young, a public radio host, tweeted that Tsarnaev had been a friend of her nephew’s, writing, “heart is broken. just confirmed, I know dzhokhar tsarnave, one of best friends of my beloved nephew,who says he never in his life saw this.”

● He “seemed like a very quiet, unassuming young man,” said George MacMasters, coordinator of aquatics at Harvard University, who hired Tsarnaev as a lifeguard there more than two years ago.