Criminal law is enforced primarily at the state level; and while the types of conduct criminalized don't vary too much from state to state, the way in which these laws are enforced often does. Tennessee criminal laws include provisions for violent crimes such as assault and battery, robbery, sexual assault, and the various types of homicide (from involuntary manslaughter to first-degree murder). Newer laws establish tough penalties for pregnant mothers who use illegal drugs such as heroin or opiates. The following articles will help you make sense of Tennessee's criminal laws. Speak with a Tennessee criminal defense attorney if you have additional questions.