TUCSON, Ariz. (13 News) - A Tucson woman was killed and a Green Valley woman was arrested following a three-vehicle accident on Oracle Road near Saddlebrooke on Saturday, Oct. 4.

Arizona DPS said 74-year-old Sandra Mader, of Tucson, died at the scene. 35-year-old Cassandra Lee, of Green Valley, was arrested on a manslaughter charge and may have been texting when she ran a red light and crashed into Mader.

DPS said Lee ran the red light at Eagle Crest Drive and crashed into Mader’s vehicle, pushing it into another vehicle.

According to a Facebook post by Cody’s Friends, Mader was a volunteer.

“We are deeply saddened by the news that Sandy M. was tragically killed in a car accident on Saturday,” the non-profit wrote. “Sandy single-handedly protected the paws of hundreds of pups in Tu

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