The heat is on LA’s drug docs as state and federal agents reportedly are running names, trying to zero in on who gave Michael Jackson the powerful surgical anesthesia suspected of killing him.

TMZ.com, the online celebrity gossip site that has led much of the coverage of the Gloved One’s death since breaking the news last month, reports the federal Drug Enforcement Administration is working with Teva Pharmaceuticals, the manufacturer of the Propofol found in Jacko’s rented manse, to track who bought it.

“Our sources say Teva looked at the lot number of the vial and found some of the vials in the lot went to AmerisourceBergen - a distributor of the drug. We’re told the DEA contacted AmerisourceBergen a few days ago and asked for all sales records of Propofol over a recent two-month period,” TMZ reported. “We’re told the DEA is looking to match doctors or other health care providers that obtained the drug with doctors who have some connection to Michael Jackson.”

Meanwhile, Us Weekly magazine has obtained video it says shows never-before-seen footage of Michael Jackson’s head catching on fire during filming of his 1984 Pepsi commercial. It shows him still dancing with his head aflame. People on the set tackle him to extinguish the fire. When Michael Jackson emerges from the pile of people trying to help him, the top of his head is bald.

The accident marked what would be the beginning of serious, lifelong pain for Jackson, who had been treated for painkiller addiction and has been described by relatives and friends as being hooked on pain medication at the time of his death.

In the ongoing investigation, California Attorney General Jerry Brown said yesterday his office has run dozens of doctors’ names, some of them thought to be aliases, through its prescription drug database. His office is assisting other agencies tracking down the drugs that may have killed the King of Pop.

“We’ve found some things, but this is early on” to provide details, Brown told Reuters. He said his investigators were given “dozens” of doctors’ names to run through its system by police probing Jackson’s sudden death, though some are considered to be aliases. he declined to say if murder or manslaughter charges could be brought in the case, but said it couldn’t be ruled out “any time you’ve got a dead body and you’ve got chemicals in large quantities.”

Jacko died at his rented Los Angeles mansion on June 25. Toxicology tests are still be conducted.