What aspect of law enforcement do state agencies typically oversee?

State agencies typically oversee state traffic and criminal investigations because they are responsible for enforcing laws that pertain specifically to the state’s jurisdiction. This includes regulating traffic laws, conducting investigations into crimes that occur within the state, and maintaining public safety and order. State agencies, such as the state police or highway patrol, often manage issues related to state highways, local crime, and other incidents that fall under state law, making their role crucial in maintaining law and order at the state level.

The other options do not fall under the typical purview of state agencies. International law is primarily governed by federal entities and international agreements, while federal crime cases are handled by federal law enforcement. Environmental regulations can involve both state and federal oversight, but they often fall under specific agencies dedicated to environmental law rather than general law enforcement agencies.