By: News 9 The Oklahoma Bureau of Investigation is investigating an attack of a police officer in Davis, Oklahoma. Authorities said an unknown suspect attacked the officer around 11 p.m. Sunday, May 2 at the police department. The officer was taken to an area hospital and was treated and released. OSBI is asking anyone with information to contact them at 800-522-8017 or email tips@osbi.ok.gov. Tips can remain anonymous.