Lamar Odom's best friend Jamie Sangouthai died from a flesh-eating disease caused by shooting up with dirty needles, a coroner found.
Sangouthai, 37, succumbed to the disease necrotizing fasciitis on Sunday a few days after he visited a Los Angeles hospital with an infection in his arm, US Weekly reports.
The flesh-eating bacteria is known to become deadly if it spreads through the body, ravaging muscles, fat and skin tissue.
Earlier reports said Sangouthai died of a heroin overdose.
Los Angeles Assistant Chief Coroner Ed Winter told US Weekly the reality sidekick's IV drug abuse played a factor.
Sangouthai and Odom had been best pals since both attended Christ the King High School in Queens in the '90s.
He made frequent appearances on the Kardashian spin-off series "Khloe and Lamar," about the ex-Laker's marriage to reality star Khloe Kardashian.
The 30-year-old Kardashian sister, meanwhile, was said to be so upset over the death that she skipped a family trip to Disneyland to celebrate her niece North West's second birthday.
Sangouthai's friends have launched a GoFundMe page to raise money for funeral expenses.