Kingsport Police Are Investigating An Incident In Which A Teenager Was Critically Injured In A Fall From A Moving Vehicle. Officers Responded To An Area Of Patriot Way At Tri-Cities Crossing. Police Said A 16-Year-Old Teen Was Driving A Pickup Truck When Another 16-Year-Old Male Juvenile Was Either Sitting On The Passenger Door Window Sill Or Clinging To The Outside Of The Vehicle. At Some Point, The Juvenile Fell From The Vehicle And Struck His Head On The Pavement. The Victim Sustained Serious Life-Threatening Injuries And Remains Hospitalized In Critical Condition. The Incident Remains Under Investigation And Charges Are Pending.