MIAMI – The world is calling Rudy Eugene, who chewed off a homeless man’s face, a cannibal — but an autopsy shows there was no human flesh in his stomach.

The post-death examination did reveal a number of undigested pills in his stomach, but investigators have not identified them yet, a law enforcement source told McClatchy Newspapers.

A Miami police officer shot and killed Eugene, 31, on May 26 as he attacked a homeless man in broad daylight off the MacArthur Causeway, tearing off his face with his teeth. By the time police arrived, most of the victim’s face was gone. Police found pieces of torn skin on the concrete sidewalk where the attack occurred.

Fueled by the Internet and widespread interest in the macabre case, some media reports have dubbed Eugene the “Causeway Cannibal” and the “Miami Zombie.”

The chatter even led the U.S. Centers for Disease Control and Prevention to issue a statement last week denying the existence of a zombie virus, and Los Angeles celebrity lawyer Gloria Allred to hold a much-panned news conference in Miami decrying the ills of cannibalism.

Eugene’s autopsy records have not been released to the public, and will likely not become available until Miami-Dade prosecutors finish their review of the shooting. That could take more than a year.

A preliminary review found the presence of marijuana in Eugene’s system, a law enforcement source said, which was no surprise because Eugene’s family and friends widely reported that he was fond of smoking pot.

Investigators assume some type of drug fueled Eugene’s bizarre behavior, but they have no indication that he may have used “bath salts,” a synthetic stimulant that in some cases can lead to psychotic episodes, paranoia and violence.

Detectives are still trying to piece together Eugene’s final hours.