This story was last updated at 12:31 a.m. on Sunday.

Three days after the fatal police shooting of 18-year-old Deon Kay, a slew of protests, marches, and an emotional vigil unfolded across the District. Crowds marched and gathered throughout the day at Malcolm X Park, Dupont Circle, and at the corner of Mellon Street and Martin Luther King Jr. Ave SE to express outrage at Kay’s killing and mourn his loss.

“We’re here to make sure that there’s not gonna be any kids that look like me that get shot because they’re just being kids that look like me in D.C.,” one 21-year-old Black protester who gave his name as D said at Malcolm X Park in the afternoon.

MPD Officer Alexander Alvarez shot and killed Kay, who is Black, on Wednesday in the 200 block of Orange Street SE in Congress Heights. Alvarez was reportedly responding to a report after seeing four people in a car live-streaming themselves holding guns on Instagram. District officials released bodycam footage from the incident on Thursday. In it, Kay can be seen holding a gun at his side, which he appeared to toss right as Alvarez shot him. A gun was found nearly 100 feet from Kay’s body.

Kay’s death has reignited fury and deepened grief for community members who have been protesting all summer, since the police killing of George Floyd in Minneapolis. D told DCist that his younger brother is the same age as Deon Kay, “so this one hurts,” he said. “We’re here to defund MPD,” he said.

Benjamin Haynes, who has participated in marches at Malcolm X Park a few times, sensed a different energy in the crowd. “This is probably the biggest one I’ve been to,” he said. “I think D.C. residents are really pissed off that a fellow D.C. resident was killed.”

He and others voiced frustration with Mayor Muriel Bowser and the D.C. government, urging both to be more transparent and “come forward with the details, not hide anything.”

While protesters marched across the city, people close to Kay and his family gathered to mourn.

Dozens of people gathered in front of the 7th District Police Department before a scheduled vigil for Kay. The crowd formed a semicircle as people took the mic to express how they were feeling.

Deon Kay’s aunt, Marie Kay, spoke to the crowd, her voice hoarse at times from protesting on Wednesday night after her nephew was killed.

“We was real close, anything he wanted I gave it to him,” she said of Deon.

She said the officer who shot Kay knew him, and that he disliked the teenager and his friends. “The officer that shot Deon, him and Deon had a problem with each other. He never liked Deon or the young boys that be down there on Mellon Street,” Marie Kay said.

“Deon probably seen this officer, Deon took off running cause Deon probably said this man gonna hurt me. He was afraid,” she said.

MPD did not immediately respond to an inquiry about whether the officer and Kay indeed knew each other.

Marie Kay said she hasn’t broken down yet, “like I really want to” because she’s trying to stay strong for the family. “But this ain’t adding up. Justice needs to be done.”

After the gathering at 7D, a vigil for Kay began in the early evening at the corner of Mellon St and Martin Luther King Ave SE. Around 200 people filled the street — April Goggans, a Black Lives Matter D.C. core organizer, said it was the largest crowd she’s seen come out for someone killed by D.C. police, except perhaps at a protest for Terrence Sterling, an unarmed Black motorcyclist that an MPD officer fatally shot in 2016.

Grandville Martin, a teacher and mentor of Deon’s who attended the vigil, described him as “energetic, inquisitive, funny.” Martin said he taught Kay from the 5th to 8th grade and coached his flag football team.

“Inquisitive is probably the best word for Deon. He wanted to know the world,” Martin said. “He was a kid that, even though his neighborhood is what it is, he still wanted to be better than what it is.”

As Kay got older, Martin said their relationship became less focused on checking in about school and more about checking in on each other emotionally.

“I would meet up with him, talk to him, give him advice about how to survive in this world as a Black man at a young age,” he said.

Kay’s family members, close friends, and educators gave speeches at the vigil, remembering the person they loved. Several speakers focused on the ways disinvestment in Kay’s Southeast D.C. neighborhood harmed him and his peers. They mentioned the lack of grocery stores and recreation centers and called out the city for failing to support Black youth and their families.

Kay’s girlfriend was also in attendance, with friends by her side throughout the night.

Shortly after 8:30 p.m., the crowd released a cluster of blue, white and silver balloons.

Protests continued into the night, as a group of about 300 people gathered and marched from Dupont Circle to Adams Morgan, sometimes disrupting outdoor diners along the way. When prodded, some diners raised their fists in support. The TheyThem Collective, one of the groups that organized the march, said protesters planned to “make noise in white gentrified neighborhoods.”

Some bars and restaurants — including Shibuya, Death Punch, Pitchers and sPACYcLOUD — handed out water to the protesters.

“We just support the movement, so they pass by and we, you know, we show our solidarity,” Tatiana Kolina, owner of sPACYcLOUD said.

She said the protests may bother some diners, but she thinks her customers are supportive of the protests’ message. “They understand what’s going on. We have to be together, and we have to be as a community to … fight for our rights,” Kolina said.

Alan Johnson said he and his girlfriend were walking in Adams Morgan when they saw the protests.

“And we just said, ‘Oh, we know the killing that just happened last week.’ And we said ‘This must be it. So we said we might as well just join,’” said Johnson, who lives in Northeast D.C. He said he wants people to stop stereotyping Black men, like him. “We want to be equal people like everybody else.”

Demonstrators briefly made their way to the 3rd District police station near the corner of V and 17th Streets NW. They stood outside and recited a list of facts about Kay’s shooting.

This group dispersed before midnight, while the protests outside the 7th District in Southeast remained steady.

Protesters chanted at a line of officers in front of the building: “hey hey, ho ho, these killer cops have got to go,” and “Say his name … Deon Kay!” Some of Kay’s family members and close friends were there, demanding the police explain why they killed Kay.

Both police and protesters shone flashlights in each other’s eyes, and a number of tense exchanges unfolded, as people shouted as the officers. “You should be ashamed,” one woman yelled. The officers briefly pushed back demonstrators and held up yellow caution tape.

Protests continued past midnight, but did not escalate.

Throughout the day, people who knew Kay spoke out against portrayals of him that they feel have not done justice to who he was as a person. Videos circulating of Kay appearing to hold guns are not the full picture of who he was, said Martin, his former teacher and football coach.

“Deon was the type of child that once you met him, you couldn’t help but fall in love with him,” Martin said. “Don’t judge the boy by a quick action. Judge him by talking to the people who knew him best. And the people who knew him best are out here crying for him today.”

This story has been updated with reporting from protests at the 7th District Police Department, Dupont Circle, and a vigil for Deon Kay in Southeast D.C.