TEWKSBURY, MA — A Lawrence man has been charged with trafficking fentanyl following an investigation into a fatal overdose at a Main Street motel.
Wilkin Castillo-Arias, 36, of Lawrence, was arrested and charged with trafficking more than 10 grams of fentanyl and possession with intent to distribute a Class B substance.
The Tewksbury Police Department began investigating the fatal overdose on Sunday, Sept. 6…