SAN DIEGO (AP) — A Southern California man has admitted in a federal plea agreement that he sold pills containing fentanyl to La Jolla man who died of an overdose.

The U.S. Attorney’s Office in San Diego says Trevon Antone Lucas of Highland pleaded guilty Tuesday to distribution of fentanyl resulting in death.

In his plea agreement, Lucas admitted he posted online ads for the illegal sale of pills. The victim responded to a posts in 2017 and began purchasing pills from Lucas.

In June 2018, Lucas sold the man nine counterfeit oxycodone pills that contained fentanyl and the victim was found dead the next morning.

The 23-year-old Lucas faces a minimum of 20 years to life in prison when he’s sentenced in July.