The story is here.
A 16-year-old bicyclist hit by a vehicle Aug. 5 died Monday of injuries from the accident, Montgomery County police said.
Codi N. Alexander of Gaithersburg was cycling on a sidewalk parallel to Great Seneca Highway. Authorities said she was attempting to cross the on-ramp to Sam Eig Highway when she was struck shortly before 3 p.m. by a Honda CRV driven by Rodolfo Ayala Sibala, 66, of Germantown.
Alexander was not wearing a bike helmet and was not required to under Maryland law, which mandates them for children under the age of 16, said police spokeswoman Lucille Baur.
Update: As noted in the comments. Montgomery County requires riders under 18 to wear a helmet.
Update 2: The Post ran a correction to the story (but haven't change the online version. That's odd) and pointed out - as someone noted in the comments - that "Montgomery County police originally thought Alexander was not wearing a helmet because it was not found at the scene; it had been transported with Alexander to the hospital by emergency personnel." So, she was wearing a helmet.
No charges have been filed in the case, and an investigation is ongoing, police said. Witnesses who have not spoken with detectives may reach the Collision Reconstruction Unit at 301-840-2435.