*As theories continue to circulate prior to the official results of an autopsy surrounding the death of Prince Rogers Nelson, the recent involvement of the Federal Drug Enforcement Administration is reportedly placing drugs in the center of the probe.

According to TMZ, the DEA and the Minnesota Attorney General are looking at opiates in particular, and the prescriptions written for the musician; along with the possible connection of enablers.

Reportedly, TMZ sources say opiates may either be the sole ingredient or at least a significant factor in Prince’s death.

READ RELATED STORY: Attorney for Prince’s Addiction Specialist Explains Pills Found in His Medical Bag (Watch)

With this new outlook, the media site says the investigation has broadened, and the original autopsy conclusion date of two weeks following the musicians death may now be longer.

prince & lamar

In other Prince news, you can expect to see a lot of “surprises” over the coming weeks. Like this previously vaulted video (see below) of the Artist performing with one of his favorite hip hoppers, Kendrick Lamar.

The two were front and center at Prince’s Paisley Park estate for an album release celebration of The Purple One’s Plectrumelectrum and Art Official Age projects two years ago. According to MTV, K. Dot and the musical icon did a live rendition of Prince’s 1998 melody “What’s My Name.”

Lamar even shared with how Prince nearly appeared on the  track “Complexion (A Zulu Love),” from his “To Pimp A Butterfly” album.

READ RELATED STORY: Nicki Minaj, Kendrick Lamar on TIME’s ‘100 Most Influential People’ List

“We got to a point where we were just talking in the studio and the more time that passed we realized we weren’t recording anything,” said Lamar. “We just ran out of time, it’s as simple as that.”