Someone has mixed a veterinary drug used for deworming cattle (levamisole) that when people take it, causes necrosis of the nose, face and ears, with cocaine. It shuts down the small capillaries and then your skin starts to die off. People who do cocaine are starting to get black spots on their flesh - the article has a lot of pictures of blackened ears. The weird thing is, the drug had a neurological effect similar to cocaine when it was tested on rats.
The cocaine supply of the entire nation may be tainted with this poison. If you do cocaine, this might be a good time to quit cold turkey.