The investigation, headed up by the the Northwest Regional Drug Task Force, targeted 60-year-old Douglas Timberlake, who police had long suspected of dealing heroin from his Alabama Street residence.
The home, which Whatcom County deputies describe as a "boarding house," is located across the street from a childcare center and has been the scene of four overdose deaths in the last several years.
In July, an undercover task force agent began buying heroin from Timberlake and two of his employees, according to deputies.
On Friday, deputies stopped Timberlake in his car. When they searched him, deputies say Timberlake had roughly an ounce of heroin on him. A second man, 55-year-old Lawrence C. Serry, was also arrested during the traffic stop. A third suspected drug dealer, 56-year-old Susan L. Figaro, was arrested later that day.
Deputies searched Timberlake's house and found a small amount of heroin.
All three were booked into Whatcom County Jail. Timberlake was booked on investigation of four counts of delivery of heroin and two counts of possession of heroin with intent to distribute. Serry and Figaro were booked on investigation of delivery of heroin.