Money is the key element for the drug dealer. If they establish a drug house where kids and adults have money to buy drugs, business will thrive. Excessive foot traffic to and from a house or property. Loitering in or around a house. Frequent and unusual traffic patterns-Stop, Enter, and Leave.
Traffic frequently stops and a resident comes out and talks briefly with occupants of car.
Threats of intimidation connected to a residence. Open exchange of drugs and money. Gang activity in area. Graffiti on structure or in area. Sudden increase in criminal activity.