- INTELLIGENCE ALERT - "BLACK CRACK" IN ROANOKE, VIRGINIA The DEA Mid-Atlantic Laboratory (Largo, Maryland) recently received a submission of a brown/black rock-like material with a faint tar-like odor, suspected “crack” cocaine. The outer surface was speckled brown in color, while the inner portion of the material was black in color (see Photo 6 to the right). The exhibit was seized pursuant to a vehicle search in Roanoke, Virginia by the Roanoke City Police. Analysis of the exhibit (total net mass 0.32 grams) by GC/FID, GC/MS, and FT-IR confirmed 86 percent cocaine base. No adulterants or diluents were detected, and the coloring agent was not identified. This was the first submission of “Black Crack” received by the laboratory.