A doctor who illegally sold Matthew Perry the anesthetic drug ketamine, fueling an addiction that led to the Friends star’s fatal overdose, has agreed to plead guilty, according to court documents.

A doctor charged with giving Matthew Perry ketamine in the month leading up to the “Friends” star’s overdose death has agreed to plead guilty, authorities said Monday.

A former corporate lawyer at two large U.S. law firms pleaded guilty on Wednesday to charges stemming from his failure to pay federal income taxes.