Close to two decades after Tupac Shakur was murdered on the Los Vegas strip, the rapper's murder remains unsolved. A segment released today for National Geographic's upcoming six-hour documentary "The '90s: The Last Great Decade?" tackles this issue with insight from the likes of Arsenio Hall, "2 of Amerikaz Most Wanted" director Gobi Rahimi--who was with the rapper on the night of his death--and Malcolm Greenridge, member of the Tupac-affiliated group The Outlawz.

"The atmosphere in Club 662 was very funky," Rahimi said of the Vegas club owned by Suge Knight. "It just seemed like there were a lot of questionable characters in there."

Moving on, Outlawz member E.D.I Mean theorizes the reason why Tupac’s murder remains unsolved. "Law enforcement around the country weren't big Tupac fans," he said. "I'm absolutely positive they know what happened. This is America. We found Bin Laden."

The three-night, six-hour documentary is slated to air in two-hour blocks July 6-8 starting at 9 pm EST each night. The series is intended to cover all of the 90s' high and lows with commentary from Roseanne Barr, Tony Blair, Matthew Perry, Jason Alexander, Monica Lewinsky, Vanilla Ice and more. Will you be tuning in?