The killings became the subjects of books, podcasts, TV series and films, further elevating Shakur — known for albums such as “Me Against the World,” on which he rapped about a life imperiled by violence, and “All Eyez on Me,” one of the genre’s first double albums — to a mythic role in hip-hop.

The investigation into the death of the Notorious B.I.G. was revived by the Los Angeles Police Department in the mid-2000s, ultimately leading to a re-examination of the Shakur killing. Greg Kading, one of the detectives who had been involved in the inquiry, later wrote a book that detailed how investigators convinced Davis to cooperate with them by offering a proffer agreement, meaning that he could not be charged with a crime based on any incriminating statements he might make in those interviews.

“I sang because they promised I would not be prosecuted,” Davis wrote in his memoir.

On the night of the shooting, Shakur had been traveling in the passenger seat of a BMW driven by Knight toward a postfight after-party at Club 662, a new venue backed by their record label, Death Row.

Davis, a self-described member of the Crips, wrote in his memoir that he, Anderson and others had armed themselves and waited in the nightclub parking lot, hoping to confront Shakur and Knight, who were associated with the Bloods, about the earlier violence.

When the rapper failed to materialize, Davis said, the group waiting for him left for its hotel, only to encounter Shakur and Knight talking to fans at a red light. “As they sat in traffic, we slowly rolled past the long line of luxury cars they had in their caravan, looking into each one until we pulled up to the front vehicle and found who we were seeking,” Davis wrote.

Davis said Shakur’s crew had committed “the ultimate disrespect when they kicked and beat down my nephew” — an attack thought to be retribution for an earlier robbery of one of Shakur’s friends. In his memoir, Davis described the “strict code” of the streets that its participants “live, kill and die by.”