A Lawrence man who sold fentanyl to a “cooperating Methuen witness” five times between February and May this past year, pleaded guilty to drug dealing this week in U.S. District Court.
Forty-two-year-old Rafael Sierra-Baez pleaded guilty to distribution and possession with intent to distribute fentanyl. U.S. Senior District Court Judge Douglas P. Woodlock scheduled sentencing for next March 28. Sierra-Baez was arrested and charged last May 19.