The indictment was unsealed upon Johnson’s arrest. If found guilty, Johnson faces between 20 years to life in prison.
Johnson is being represented by a federal public defender, who did not return a request for comment.
There were 847 heroin-related deaths from January to September 2017 in Maryland, down from 903 in the same time the year before, according to data from the Maryland Department of Health. Forty of those heroin-related deaths in that time period occurred in Prince George’s County.
Johnson made his initial court appearance in the U.S. District Court for the District of Maryland on March 19 in front of U.S. Magistrate Judge Timothy Sullivan.