This is a news release from the Montgomery County Police Department published verbatim.
[UPDATED: 10 p.m., 11/24]
Mr. Rivas-Macal succumbed to his injuries at the hospital on Friday, November 23, 2018.
[UPDATED 1:40 pm, 11/19 with victims’ identities, other details] Detectives from the Montgomery County Police Collision Reconstruction Unit are investigating a personal injury hit-and-run collision involving a pedestrian that occurred in Derwood Sunday evening.
At about 10:09 p.m., officers from the 5th District along with Montgomery County Fire and Rescue Service personnel responded to Muncaster Road in the area of Beechdale Court for a single vehicle collision with an additional collision involving a pedestrian.
Preliminary investigation revealed that a 2006 Chevrolet Cobalt was traveling southbound on Muncaster Road when for reasons still under investigation, it left the roadway and hit an embankment and rolled over. Further assessment of the scene revealed that the passenger of the Cobalt was ejected from the car during the collision. Investigators believe that a dark-colored Ford Mustang may have been involved in some manner with the collision. Investigators are seeking to speak with the driver of the dark-colored Ford Mustang.
The driver of the Cobalt has been identified as 24-year-old Mario Antonio Jandres-Rivera of Ginger Court in Germantown. Mr. Jandres-Rivera was transported to a local hospital where he is reported to be in stable condition.
The passenger of the Cobalt has been identified as 23-year-old Oscar Eduardo Rivas-Macal of Washington Grove Lane in Gaithersburg. Mr. Rivas-Macal was transported to a local hospital with life-threatening injuries.
This collision investigation is ongoing. Anyone with information is asked to call the Collision Reconstruction Unit at 240-773-6620.