The video is grainy, the sound raw, but it’s hard to look away. A small, nervous man is describing the previous night’s commute to a police detective. In his telling, he has exited Grand Central Terminal onto East 43rd Street, heading to a midnight shift at a copy shop.“I cross the street on Lexington Avenue — I notice him standing on the side right there,” he says.The detective interrupts. “When you say him, who are you referring to?”“The guy that I stabbed,” the man says.The interview continues, and the nervous man explains why he stopped to talk to the man he stabbed: He did not want to alienate a potential fan. “I have a social status,” he says. “I’m part of this rap group called Grandmaster Flash and the Furious Five.”The fatal encounter came on the first day of August 2017. The following day, Nathaniel Glover, better known as Kidd Creole, who helped create the blueprint for rap music, was under arrest for the murder of John Jolly, 55. He spent the next four and a half years in jail awaiting trial, was convicted of manslaughter in April and, last month, at the age of 62, was sentenced to 16 years in prison.“I didn’t mean to kill him,” he told the detective the night after the stabbing. “I wish that I would just have stayed home. I didn’t even want to hurt him. He just made me so afraid, that’s all. And I just didn’t want him to hurt me.”South Bronx RisingKidd Creole, right, with Grandmaster Flash and the Furious Five in 1984.Anthony Barboza/Getty ImagesThe saga of Kidd Creole, from the pinnacle of hip-hop stardom to a Bronx rooming house and a series of menial temp jobs, is a parable of rap’s first generation. It is a story of extravagant creativity, an industry that took advantage of its very young creators and a man who never stopped dreaming of a way back into stardom.“This entire music genre was founded by us,” said Grandmaster Caz, a contemporary of Kidd Creole. “And how much is it worth? How much do we own?”The answer, for most of the genre’s pioneers, is not much.Nathaniel Glover Jr. was born Feb. 19, 1960, the third of five children in a working-class Bronx family. His father, Nathaniel Sr., was a handyman who would repair floors; his mother, Sarah, took care of the home.“We basically were sheltered,” said his sister, Glander, one year older. “We weren’t allowed to hang out late at night, be outside, be late.”Nathaniel was a shy, undersized adolescent who favored soft rock and Motown. He and his younger brother Melvin would sneak away with their sister’s poetry notebooks, enchanted by the rhymes. In the Bronx, at that time, it was a useful interest to cultivate.By the mid-1970s, neighborhood D.J.s started holding parties in parks and community centers. In July 1977 — the month of a blackout that left New York City dark — the brothers met a D.J. named Joseph Saddler, who called himself Grandmaster Flash.Flash worked with a bowlegged teenager named Keef Cowboy, who energized the crowds with simple rhymes and exhortations. When a friend enlisted in the military, Cowboy teased him on the microphone: “Hip, hop, hip, hop!”The new culture would soon have a name.Nathaniel and Melvin were the next to join. Nathaniel became Kidd Creole, from the Elvis Presley movie “King Creole”; Melvin became Melle Mel.The Great ReadMore fascinating tales you can’t help but read all the way to the end.Using the Vatican’s own archives, a soft-spoken scholar has become arguably the most effective excavator of the church’s hidden sins.TikTok choreography, dancing umpires, a ballet-trained first-base coach: The Savannah Bananas, a collegiate summer league baseball team, has amassed a following by leaning into entertainment.There is growing evidence that MDMA — the illegal drug known as Ecstasy or Molly — can significantly lessen or even eliminate symptoms of PTSD when the treatment is paired with talk therapy.They were the Three M.C.s — later the Furious Four, and finally, Five — giving shape to what hip-hop would become. Their parties were epic, and they were stars — untrained, disrespected by mainstream artists and creating the music that would define much of Black culture for the next 50 years.“We didn’t have any idea that it would be an original form of American music,” Mr. Glover said last month, speaking from the floating jail barge where he spent years waiting for his trial. “We was just trying to have fun, make a couple of dollars, meet some women. It wasn’t that we had in our head, ‘Oh, this is going to be the start of something big.’”Creole was not as lyrically deft as the other group members, but he had a way of connecting with audiences, said MC Sha-Rock, a member of the Funky Four Plus 1, the Furious Five’s chief rivals in the early days. “Every rhyme, every word made you feel like he was talking to you,” she said. “It was strange: being a teenager, how did you just know that this is what you had to do to engage a crowd?”From another D.J.’s party, Creole picked up a phrase and made it a hip-hop fundamental: “Yes, yes, y’all.”Major record companies saw the music as a fad, leaving it to independents: Enjoy, Sugar Hill, Tommy Boy, Tuff City. When Sugar Hill offered the group a contract in 1980, the rappers signed the papers on the trunk of a Lincoln Town Car at the Englewood, N.J., home of the label’s owners, Sylvia and Joe Robinson, according to Guy Todd Williams, better known as Rahiem, another member of the Furious Five. He was under 18, the others just over. Like the other performers on the label, they knew nothing about the music business.The gloss of the studio and the authority of the engineers made Mr. Glover feel like he was a member of the Motown groups he looked up to, one of the Temptations, maybe.“We kind of felt like we were walking in their footsteps,” he said.What followed was music history and decades of litigation.Sugar Hill became the group’s managers, publishers, producers and recording company. Tension grew when the record label selected Melle Mel as a de facto frontman, alienating the others. Mel was the only member who participated in the Furious Five’s highest charting hit, “The Message” — it is his voice reciting the song’s familiar refrain: “Don’t push me ’cause I’m close to the edge / I’m trying not to lose my head.”The invention, the crowds, the concerts, made the six members of the group into celebrities. But it wouldn’t last. Even as the group recorded songs that defined the new genre, they never received any royalty payments, Rahiem said. (Flash, Melle Mel and Scorpio all declined to be interviewed for this article; Cowboy died in 1989.) Eventually, Grandmaster Flash had to sue just for the right to use his own stage name.It was a familiar story, said Rocky Bucano, executive director of the Universal Hip Hop Museum, which is scheduled to open in the Bronx in 2024.“This goes not just for the guys in hip-hop, but the guys in R&B, soul and every other music genre,” Mr. Bucano said. “The early guys who started as teenagers got taken advantage of and ended up with the short end of the stick.”The band ultimately made some money when the label paid the performers to settle two lawsuits in 2002 and 2007; another is still ongoing.Leland Robinson, son of the label founders, said that Sugar Hill paid the performers all royalties due them, and that any lingering litigation would soon be resolved. “We are one,” he said, claiming close relationships with Scorpio and Melle Mel. “I’m just tired of bad press.”Styles ChangeKidd Creole, right, and his group became stars, helping to create the genre that would define much of Black culture for the next 50 years.Michael Ochs Archives, via Getty ImagesOnstage, the group was dynamic and seamless. They toured the world. But offstage there were problems: egos, drugs, friction over loyalty to the Robinsons, which helped seed a rift between the Glover brothers that persists to this day.Styles were also changing. In 1983, the group Run-DMC. from Queens, came out with a stripped-down sound and look that made the Furious Five, with their flashy hair and designer leathers, seem dated. They still performed, but the hits stopped coming and the audiences were smaller. Mr. Glover was just 23, and his star turn was ending. The first generation of hip-hop pioneers — the oldest of the old school — were disappearing from view.“There was never a Plan B for them,” said Sha-Rock. As her career waned, she went on to become a corrections officer in Texas. (She couldn’t do it in New York, she said, “because I would know all the people coming through.”)Mr. Glover spoke candidly about the pain of losing his star status. “It was disappointing to stand on the sideline and watch people achieve,” he said.After a last brief turn in New York’s spotlight in 1994, hosting a call-in radio show on Hot 97 that was canceled the next year, Mr. Glover began to take on temporary jobs — security guard, maintenance, office work — which gave him flexibility for occasional gigs or short tours. In 1997, he moved into a modest rooming house in the West Bronx, still believing the group had the talent to get back on top.He bought himself a beat-making machine and an eight-track recorder so he could produce his own songs, but he could never get anyone to take much of an interest. In 2012, he posted a series of videos of himself rapping, hoping to drum up a following on YouTube. Five years earlier, the group had been inducted into the Rock & Roll Hall of Fame, but now his videos rarely got more than a few hundred views.“You went from having everything to having almost nothing,” his sister said. “That’s a deep dive.”And in the rooming house, he was essentially anonymous.“Hardly anybody knew I was part of the recording industry,” he said. “I kept that to myself.”It was a life he never quite got used to.“Ain’t like nobody was walking up to him, ‘Ain’t you so-and-so from Grandmaster Flash?’” said Van Silk, a promoter who worked with the group. “Because the time has passed.”A Fatal ConfrontationInduction into the Rock & Roll Hall of Fame in 2007. Mr. Glover, center right, went from “having everything to having almost nothing,” his sister said. “That’s a deep dive.”Peter Kramer/Getty ImagesIn the summer of 2017, Mr. Glover thought he had finally caught a break. Capitalizing on growing nostalgia for old school hip-hop, the surviving Furious Five MCs were booked to perform at the 6,000-seat Dell Music Center in Philadelphia, on a bill with other veteran hip-hop acts. It would be Mr. Glover’s first time in front of an audience in more than five years, and he hoped it might lead to a full tour.“I always enjoyed being out on the road performing,” he said in a call from jail. “It’s in my blood. I can’t get away from it.”On Aug. 1, three weeks before the Philadelphia gig, Mr. Glover rode the subway to Grand Central Terminal for his midnight shift in Manhattan. Since being robbed after a trip to the store for milk and beer a dozen years prior, he had begun carrying a steak knife attached to his forearm with a rubber band.“I went across Lexington Avenue, that’s when I noticed the guy,” he would tell Mark Dahl, a prosecutor from the Manhattan district attorney’s office, the next night. He said that seeing a man standing alone was “a red flag for me.”But Cheryl Horry, John Jolly’s cousin, doubted there was anything unusual going on: “Most likely my cousin was standing there drinking a beer,” she said. “When he’s drinking his beer, he’ll lean against the wall, and he’ll speak to everybody.”According to Ms. Horry, Mr. Jolly was born in Charleston, S.C., but moved to New York with an uncle after his parents died. As an adolescent, he left school for a series of jobs, Ms. Horry said, including a stint at White Castle. He had a habit of distancing himself from his family, and this became more pronounced as an adult, particularly after he’d been drinking heavily. Ms. Horry and others lost touch with Mr. Jolly, seeing him only occasionally, often during the holidays.“We never knew why,” she said. “When he’d come around, we always used to tell him: ‘We’re family. Even if you don’t want to be around family, call us, let us know you’re all right.’”According to Mr. Glover and surveillance video of the confrontation, Mr. Jolly said something to Mr. Glover as he passed by that August night. But Mr. Glover had earbuds in, listening to a song by the Eagles. Take it easy, take it easy / Don’t let the sound of your own wheels drive you crazy.Mr. Glover said that he took out his earbuds, not wanting to be rude, in case the man was a fan — in which case, he would have apologized for initially ignoring Mr. Jolly and thanked him for the recognition. But when he realized that Mr. Jolly had only said, ‘What’s up?’ he responded in kind. “Nothing, bruh, nothing,” he said and put the buds back in.Surveillance video from a neighboring office building shows Mr. Glover then strolling out of the frame. After several seconds, Mr. Jolly is seen gesticulating in the direction that Mr. Glover has gone. He then walks purposefully toward him, still gesturing, until he is right in the face of Mr. Glover, who has walked back into the frame. Mr. Glover makes to leave, and Mr. Jolly follows him. Both men drift out of sight. What happened next was not caught on camera.Throughout his four and a half years in jail, Mr. Glover has never denied that he stabbed Mr. Jolly, even pantomiming for the prosecutor during the interview the following night the motion he used, two sharp jabs to Mr. Jolly’s chest. On the phone recently from the Vernon C. Bain jail barge, he was just as blunt.“I’m backing up, and he’s moving toward me,” he said. “He was sweating and his eyes was bulging.” Mr. Glover backed off, he said, and Mr. Jolly moved forward. “And then that’s when I stabbed him.”Rahiem, who stayed in touch with Mr. Glover as he awaited trial, said that the rapper never appeared broken. “He seemed determined, resilient, innocent, but disappointed in the way the justice system was working against him,” Rahiem said.But while he expressed deep remorse in his initial interviews with law enforcement, Mr. Glover became increasingly fixated on the surveillance video during his years in jail, telling family members, friends and reporters that it had been manipulated to make Mr. Jolly seem less aggressive. (The New York Times asked a video expert, Catalin Grigoras, the director of the National Center for Media Forensics at the University of Colorado, Denver, to analyze the video in question, and he said it bore no signs of manipulation.)Finally, this March, a trial commenced. Mr. Glover’s trademark long hair was shorn, his face creased by time. He looked small and uncomfortable in an oversize suit, and he did not testify, leaving it to Scottie Celestin, the fifth in a string of lawyers representing him over the years, to argue that Mr. Jolly died from mismanaged care at the hospital, not from his two stab wounds.Mr. Glover’s supporters were irate when the judge, Michele S. Rodney, told the jurors not to consider whether Mr. Glover acted in self-defense. New York law says that deadly physical force is permissible only in response to an aggressor who is also using deadly physical force; Mr. Jolly was unarmed.On April 6, the jury returned a verdict acquitting Mr. Glover of murder — which requires intent — but convicting him of manslaughter. On May 4, Mr. Glover was sentenced to 16 years. If he serves the full term, he will be 73 when he leaves prison. Asked to speak before the sentencing, he made no apology to anybody, as Cheryl Horry noted bitterly afterward.Mr. Glover said to the judge, “I’m very disappointed in the way that the whole situation has played out,” adding that he had been portrayed as a person with no remorse or humanity. “I also feel that at a certain point the truth of all this will be revealed and I will be exonerated,” he said. Mr. Celestin said he planned to appeal.The day of the sentencing, Sylvia Robinson, who had been the chief executive of Sugar Hill Records, was posthumously inducted into the Rock & Roll Hall of Fame. The music that she, Mr. Glover and a small handful of others brought into the world is now almost 50 years old, and it is the dominant form of popular music today. Hip-hop’s legacy includes revolutions in fashion and language, lasting fame and enormous fortunes — but it left Mr. Glover working a midnight shift over a photocopier.The tragedy of Kidd Creole, the rapper, is that the culture he helped create had so little need for him. The tragedy of Nathaniel Glover and John Jolly was a random encounter of no more than seven minutes. Mr. Glover believed to the end that he was one break away from relaunching his music career.Sha-Rock, now 60, sees in Mr. Glover’s fall a legacy of neglect: first by the city, and then by the industry.“Sugar Hill Records created the space for people to hear us outside of New York City,” she said. “But we were supposed to be protected as young teenagers. He shouldn’t have had to be working at a copy shop, I shouldn’t have to be working as a corrections officer. We were supposed to have been protected. We gave you everything that was dear to our heart and dear to the culture of hip-hop. That’s real.“We gave you our blood, sweat and tears, and transformed rap records,” she continued. “You were supposed to protect us.”Mr. Glover agrees. “If I was doing anything that had any relation to the industry, I wouldn’t have been there,” he said. “I would have been home.”He protests the case against him, talking to anyone who will listen about his issues with the surveillance video. Though he has never stopped admitting to the stabbing, the contrition he displayed on the night after the killing has disappeared. “My conscience is clear,” he said.“He initiated this whole thing,” he said of Mr. Jolly. “I didn’t want anything to do with him.” He mentioned the show scheduled for later in the month. “The group was ready to get back together,” he said. “I was getting ready to go back to my life the way it was.”The concert in Philadelphia went on without him. More