A woman picking her mother up from work was killed after she was caught up in a road rage incident that had nothing to do with her, Arizona authorities say.

Yarely Ashley Hermosillo, 27, was in the passenger seat of her boyfriend's car when they went to pick up her mom from work on Saturday. Her 4-year-old son also was in the car. They were at a red light around 11:45 p.m. at the intersection of W. Camelback Road and N. 51st Avenue in Glendale, a city some nine miles northwest of Phoenix, when a gunshot suddenly rang out, sending a bullet through the front windshield and striking Hermosillo in the face, according to police.

Hermosillo's boyfriend sped to the nearest hospital, but she did not survive her injuries.

According to a probable cause arrest affidavit , detectives later learned

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