To start as a police artist or forensic artist, certain things are needed to become accredited, but many times artists start drawing with little formal training. Some certifications require that the artist complete a certain number of suspect sketches and be given a recommendation by law enforcement. So in that case, you have to get some police sketches under your belt. As with any career you consider, you want to read as much as you can about it.
Here are some links to get you started. Don't forget to bookmark this page so you can come back.
Forensic art - How it's done:
Information about forensic art as a career:
Here are some links to help you get more information
