A 65-year-old Postville, Iowa woman led Grant County law enforcement on a chase on U.S. 151, due to a medical condition according to authorities, before the chase was stopped by stop sticks by Dubuque police Sunday morning.

The driver died at Mercy Medical Center–Dubuque Monday.

Grant County sheriff’s deputies began following Randi L. Harris on U.S. 151 between Platteville and Dickeyville Sunday around 10:15 a.m. Harris was not driving over the speed limit, but was driving erratically and aggressively, according to Dubuque police.

Stop sticks were used on 151 near Dickeyville and on U.S. 61/151 near the Wisconsin 11/35 exit, but Harris’ car kept going. After Harris entered Iowa, Dubuque police used stop sticks on 61/151 near Locust Street, which finally stopped Harris’ car.

Dubuque police Lt. Pablo Ramirez told the Dubuque Telegraph Herald “it was clear she was not coherent” when police got to Harris’ car.