In a car crash or other incident involving multiple vehicles the police may investigate whether the driver of any of the vehicles is under the influence of or intoxicated by alcohol or drugs, and are not limited to investigating and arresting only the driver who was at fault in the accident, for example.
In Oklahoma, if a car crash or other incident involving multiple vehicles occurs, law enforcement officers have the authority to investigate all drivers involved for potential intoxication or impairment due to alcohol or drugs. This is not limited to the driver who is presumed to be at fault for the accident. Oklahoma's laws on driving under the influence (DUI) allow police to conduct field sobriety tests, breathalyzer tests, or other chemical tests if they have reasonable suspicion that a driver is impaired. If a driver is found to be under the influence, they can be arrested and charged with DUI, regardless of their role in the accident. The state's implied consent law means that drivers have implicitly agreed to submit to such tests by virtue of operating a vehicle on Oklahoma roads, and refusal to comply can result in additional penalties.