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 Maryland, when a car crash or multi-vehicle incident occurs, law enforcement officers have the authority to investigate all drivers involved for potential impairment due to alcohol or drugs. This means that even if a driver is not at fault for the accident, they can still be subject to investigation and arrest if there is probable cause to believe they are under the influence or intoxicated. Maryland's Transportation Code § 21-902 outlines the state's DUI and DWI laws, which prohibit driving while impaired by alcohol, drugs, or a combination of both. Police officers can use field sobriety tests, breathalyzers, or other chemical tests to determine impairment. If a driver is found to be in violation of these laws, they can face criminal charges, regardless of their role in the accident.