LAS VEGAS (AP) — A home that Las Vegas police raided this week in connection with the 1996 drive-by shooting of Tupac Shakur is tied to one of the only surviving witnesses to the crime, a man long known to investigators whose nephew was seen as a suspect shortly after the rapper’s killing.

Detectives sought items “concerning the murder of Tupac Shakur” from Duane “Keffe D” Davis, according to warrant documents obtained Thursday by The Associated Press.

Davis, now 60, is a self-described “gangster” and the uncle of Orlando Anderson, one of Shakur’s known rivals. Anderson denied involvement in Shakur’s killing at the time, and died two years later in a shooting in Compton, California.

Police reported collecting multiple computers, a cellphone and hard drive, “documentary documents,” a Vibe magazine that featured Shakur, “purported marijuana,” several .40-caliber bullets, two “tubs containing photographs” and a copy of Davis’ 2019 tell-all memoir, ”Compton Street Legend.”

The Las Vegas Metropolitan Police Department confirmed it served a search warrant Monday in the neighbouring city of Henderson. The department hasn’t said whether investigators expect to make an arrest for the first time in the slaying of the rapper nearly 27 years ago.

Residents of the neighbourhood in foothills about 20 miles (32 kilometres) southeast of the Las Vegas Strip said they saw officers detain two people outside the home Monday night while investigators searched the one-story property.

“There were cruisers and SWAT vehicles. They had lights shining on the house,” said Don Sansouci, who watched from the sidewalk as a man and a woman stepped out of a house to bullhorn commands, placed their hands behind their heads and slowly walked backwards toward officers amid a swirl of blue and red police lights.

The case is being presented to a grand jury in Las Vegas, according to a person with direct knowledge of the investigation who was not authorised to speak publicly. The timing and results of those proceedings was unclear, and the person did not identify the two people whom police encountered at the house.

It was not immediately known if Davis has a lawyer who can comment on his behalf. Messages left for Davis and his wife, Paula Clemons, weren’t returned. Records show the two were married in Clark County, Nevada, in 2005.

News of the search breathed new life into Shakur’s long-unsolved killing, which has been surrounded by conspiracy theories. There has never been any arrest and attention on the case has endured for decades.

“I’m one of the only living eyewitnesses to Tupac’s killing, who also knows the much larger story around the reasons why both Tupac and Biggie were killed,” Davis wrote in the memoir, referring also to the 1997 killing of rapper “Biggie Smalls,” also known as “Notorious BIG.”

Shakur’s death came as his fourth solo album, “All Eyez on Me,” remained on the charts, with some 5 million copies sold. Nominated six times for a Grammy Award, Shakur is largely considered one of the most influential and versatile rappers of all time.

On the night of September 7, 1996, Shakur was riding in a black BMW driven by Death Row Records founder Marion “Suge” Knight in a convoy of about 10 cars. They were waiting at a red light a block from the Las Vegas Strip when a white Cadillac pulled up next to them and gunfire erupted. Shakur was shot multiple times and died days later.

Knight, now 58, was wounded but recovered. He was sentenced in October 2018 to 28 years in prison for running over a man with his pickup truck, killing him, in a Compton burger stand parking lot in January 2015.

The Shakur shooting unfolded shortly after a casino brawl earlier in the evening involving Anderson, Shakur and their associates.