Police: Stoned driver kills pedestrian in drive-through

Sonia Toor was accused of being high on marijuana when she allegedly struck and killed pedestrian Nina Falk, 84, in a Walgreens drive-through in San Mateo on Nov. 14. Sonia Toor was accused of being high on marijuana when she allegedly struck and killed pedestrian Nina Falk, 84, in a Walgreens drive-through in San Mateo on Nov. 14. Photo: Courtesy San Mateo County Photo: Courtesy San Mateo County Image 1 of / 1 Caption Close Police: Stoned driver kills pedestrian in drive-through 1 / 1 Back to Gallery

A woman who was impaired by marijuana backed up and fatally ran over an elderly woman in the drive-through of a San Mateo drug store, authorities said.

Sonia Toor, 21, of San Mateo was charged Monday with gross vehicular manslaughter and driving under the influence, both felonies, after she was jailed by police in the death of Nina Falk, 84.

Falk, who also lived in San Mateo, was walking near the Walgreens at 191 East Third Ave. about 2:45 p.m. Friday when she was hit by a vehicle driven by Toor, police said.

Investigators determined that Toor had driven her vehicle to the drive-through section of the drug store and then changed her mind about waiting, police said.

Toor backed away quickly and ran over Falk, police said. Falk died Saturday at a hospital.

Henry K. Lee is a San Francisco Chronicle staff writer. E-mail: hlee@sfchronicle.com Twitter: @henryklee