Federal court officials say four people pleaded guilty to drug charges that were related to the pill pipeline.
Investigators say the four were part of a large prescription drug ring that distributed thousands of prescription drugs in Ashland.
Darnell Butler, Christian Mayhone, and Charlie Angell pleaded guilty Wednesday to conspiracy to distribute OxyCodone.
Leonard Vaugh pleaded guilty to attempt to possess with the intent to distribute OxyCodone.
Court officials say the pills came from Florida.