A Lafayette man pleaded guilty in federal court this week to smuggling and selling thousands of pills a week he bought through the black-market website known as the Silk Road, the U.S. Attorney’s Office announced Friday.

Michael Munro Jr., 37, pleaded guilty Wednesday to one count of smuggling controlled substances and one count of possession with intent to distribute Schedule IV narcotics, according to a news release from U.S. Attorney Stephanie Finley’s Office, of the Louisiana Western District.

Munro was arrested in November 2014 and July 2015, accused of buying the drugs from overseas and having them delivered through the U.S. Postal Service or FedEx locations in and around Lafayette, the release states.

Munro admitted to ordering 1,000 to 1,500 Xanax bars at a time — the drugs are used medically to treat anxiety — and selling 3,000 pills of the painkiller OxyContin per week, the release states.

Munro faces 20 years in prison on the smuggling count and five years on the distribution charge, along with three years of supervised release and a $250,000 fine.

U.S. Homeland Security Investigations investigated the case, along with the U.S. Postal Inspection Service and Lafayette Metro Narcotics.