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 Minnesota, when 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. Under Minnesota Statutes section 169A.20, driving while impaired (DWI) is a criminal offense, and police can arrest any driver who is found to be operating a motor vehicle under the influence of alcohol, controlled substances, or other intoxicating substances, regardless of their role in the incident. The investigation may include field sobriety tests, breathalyzer tests, or other chemical tests to determine the level of intoxication. If a driver is found to be in violation of DWI laws, they can face charges and penalties as prescribed by state law, which may include fines, license suspension, and even imprisonment.