Even if you knew the driver of a vehicle in a single-car accident, if you were harmed as a passenger in their vehicle you can still bring a personal injury claim against them in Washington, D.C. There may be factors that complicate your case—for example, if you contributed to your injuries by not wearing a seatbelt, or if you caused the accident in any way, such as by grabbing the steering wheel or obstructing the vision of the driver—but an experienced personal injury attorney can help you determine the viability of your claims.