For a complete description of drugs, symptoms, and uses check out the DEA Home Page . Crime to Court offers a video special here . Marijuana is likely the most common and officers know what that looks like. Powered cocaine is a little difficult to identify conclusively. It's a simple white powder.
Field testing is needed for probable cause to make an arrest.
Rocks can be any size and sell for various prices. Another street drug is heroin . Heroin may be sold in different color bags. These bags may have a variety of names such as Little Executioner, which allows the purchaser to ask for the product by name. It is sometimes hard to tell.