Each county board of developmental disabilities employs an investigative agent or contracts for their services. Investigative agents are often called IAs for short. An IA is required to investigate all reported MUIs, or major unusual incidents. These investigations include the identification of causes and contributing factors and prevention plans to help reduce the likelihood of re-occurrence. IAs are certified through DODD and are required to attend civil and criminal investigatory practices training and obtain credit hours to maintain their certification.