As WW reported last week, a block of commercial properties in downtown Portland owned by a prominent real estate family is now occupied by an open-air drug market.

The Portland Police Bureau has been doing frequent drug missions in the area, and officers have turned to Instagram to document their finds: a sea of blue fentanyl pills, white powders, guns and ammunition.

But who are the police arresting, and what brought the dealers to this single downtown Portland block?

For the past week, WW has pored over court records looking for clues. The results are not conclusive, although there are hints that Portland’s illicit fentanyl trade follows a familiar pattern.

In many of these cases, culled from recent state and federal court records, police arrested people living on the streets, selling drugs to fuel their addiction. But in others, police appear to have caught more sophisticated dealers, offering a window into how business is conducted at the drug market.