An Arizona woman is dead after she made a desperate 911 call telling deputies that her boyfriend had taken an “illegal drug” was refusing to let her out of the vehicle while driving up Mt. Lemmon outside Tucson early Saturday evening.

The Pima County Sheriff’s Department said it got the call shortly before 6:30 p.m. Saturday, KVOA reported.

Deputies found the car, but the boyfriend, later identified as William Holloway, refused to stop and led the deputies on a low-speed chase up the mountain.

At some point during the pursuit, the woman, who has not been publicly identified, jumped from the moving car. First responders rendered aid and took her to a hospital, but she died from her injuries. It wasn’t clear if she died solely from injuries incurred when she jumped out of the vehicle or if she had suffered previous injuries.

According to KOLD, deputies took Holloway, 36, into custody after his car had a flat tire, charging him with domestic violence kidnapping, 1st degree homicide, and unlawful flight from law enforcement.

He’s being held on a $750,000 bond, according to jail records.

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[Featured image: William Holloway/Pima County Adult Detention Center]