A Georgia public health doctor has been accused of using steroids to treat his four children with a rare form of brain cancer, according to authorities.

Dr. William A. Cone is accused of injecting his children with human growth hormone, or HGH, in January 2016 and February 2017, according a complaint filed Tuesday in U.S. District Court in Atlanta.

Cone was fired by the state in August 2017, and authorities say he used the steroids in July 2018 and August 2019 to treat the children, ages 4 to 10, according the complaint.HGH is a synthetic form of testosterone that has been used for years to treat conditions including high blood pressure and high cholesterol.

It’s a hormone that has also been used to treat erectile dysfunction.

The children are now living with the health care provider, Dr. Joseph R. Cason, and are undergoing chemotherapy treatments.

They have not responded to requests for comment.

The complaint also alleges that Cone gave his children and another child a cortisone shot to treat a rare neurological disorder known as CTE.

Cason, an orthopedic surgeon who had been practicing in Atlanta for nearly two decades, was arrested on suspicion of multiple counts of tampering with government records, fraud and abuse of power, among other charges.

His arrest came as the state and federal governments are struggling to contain the growth of the disease in the United States.