Lexington police are awaiting toxicology test results on a driver involved in a fatal crash a week ago on Delong Road.
Charges against the driver could be possible depending on the test results, police spokeswoman Sherelle Roberts said Thursday.
Police said Jeremy Arvin was driving a Nissan 370Z on Delong Road about 10:30 p.m. on Jan. 4 when the car left the pavement and struck a tree.
A passenger, MacKenzie B. Hertweck, 21, died Tuesday night at University of Kentucky Chandler Hospital of brain injuries she suffered in the crash.
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Police have said the car was traveling at high speed, and that alcohol use was suspected.
A decision on charges will be made once the test results are available, Roberts said. The tests could take a few weeks.