(TMZ) - The passenger who was savagely removed from United flight 3411 is a medical doctor with a sordid history.

Dr. David Dao was charged in 2005 with 98 felony drug counts for illegally prescribing and trafficking painkillers. Prosecutors claimed Dao fraudulently filled prescriptions for hydocodone, Oxycontin and Percocet.

Dr. Dao was also convicted on six felony counts of obtaining drugs by fraud and deceit and in 2005 was given five years probation.

Dao was also convicted for writing prescriptions and checks to a patient in exchange for sex.

In February, 2005, Dr. Dao surrendered his license to practice medicine in Kentucky. In 2015 the medical board lifted the suspension and allowed him to practice medicine again. Last year, the medical board imposed restrictions on his right to practice. He can only practice internal medicine in an outpatient facility one day a week.

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