Knox Place Defendant Pleads Guilty in Wide-Ranging Narcotics Trafficking Conspiracy

WASHINGTON - Darryl Dacota Riley, Jr, 39, a previously convicted felon residing in the District of Columbia, pleaded guilty today in U.S. District Court in connection with his role in a drug trafficking conspiracy that reached across the United States and sold PCP, cocaine, and fentanyl in the 2900 block of Knox Place in Southeast D.C., announced U.S. Attorney Jeanine Ferris Pirro.

Riley, aka "Slice," pleaded guilty to conspiracy to distribute one kilogram or more of phencyclidine (PCP), 500 grams or more of cocaine, and 40 grams or more of fentanyl. In addition, Riley pleaded guilty to unlawful possession of a firearm and ammunition by a felon. Judge Timothy J. Kelly, who accepted the plea, scheduled sentencing for May 14, 2026.

According to court documents, in the summer of 2024, FBI agents initiated a long-term investigation of a drug trafficking conspiracy centered around the 2900 block of Knox Place, SE, where law enforcement had identified an alleged fentanyl and PCP trafficker with a stash house. Over the course of their investigation into the trafficker's narcotics suppliers, agents determined that Riley served as a bulk PCP supplier within the conspiracy.

Riley is the third defendant to plead guilty thus far after a years-long investigation that culminated in the arrests of fourteen individuals in August 2025 after the FBI executed 20 residential search warrants across the District, Maryland, and Los Angeles. Investigators at the time seized 20 firearms, more than two kilograms of suspected cocaine, crack cocaine, and fentanyl, a kilo press commonly used to compact kilogram-quantities of powdered narcotics, and over $100,000 in cash.

The Knox Place neighborhood has experienced at least five homicides in the past year, among other violent crimes. According to court documents, the D.C. traffickers who operated around Knox Place sourced their narcotics through a Baltimore-based co-conspirator, who in turn was importing narcotics from California. One of the shipments from California included 17 gallons of PCP that was intercepted last year by law enforcement outside of Topeka, Kansas.

On Aug. 26, 2025, investigators searched Riley's residence on the 1900 block of Naylor Road, SE, and recovered about 900 grams of cocaine, about 11 grams of crack cocaine, 120 grams of fentanyl, more than 7 grams of methamphetamine, and $20,097 in cash. In addition, agents recovered a loaded Taurus 9mm handgun, a loaded and chambered Glock 21 45mm pistol; and a loaded privately manufactured AR-style .223 caliber firearm with no serial number.

Joining U.S. Attorney Pirro in the announcement was FBI Assistant Director in Charge Darren B. Cox.

This case was investigated by the FBI Washington Field Office with valuable assistance from the DEA and the MPD. It is being prosecuted by Assistant U.S. Attorneys Matthew W. Kinskey, Sarah Akhtar, and John Crabb of the Violent Crime and Narcotics Trafficking Section of the U.S. Attorney's Office for the District of Columbia.

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