Four people died May 5 in a wrong-way crash on I-19.

The Arizona Department of Liquor has launched an investigation into what led to the wrong-way crash that killed four people May 5, and DPS said it is talking to witnesses in the case.

Jeffery Trillo, a spokesman with the Department of Liquor Licenses and Control, wrote in an email that the agency's case will "take a backseat" to the criminal investigation under way by the Arizona Department of Public Safety "so as not to impede or influence that case."

The department won't release results until DPS concludes its investigation, Trillo said.

A DPS spokesman said Tuesday that investigators are waiting on toxicology results to see if Tambra Hoskins, 52, was intoxicated while she was driving south in the northbound lanes of I-19 that morning.

“There are several witnesses we are working with as we complete the investigation which is a multi-agency effort,” spokesman Bart Graves said. He wouldn't comment on specifics involving the investigation.

According to DPS, Hoskins, a Green Valley resident, struck a vehicle head-on carrying a Tucson family around 12:45 a.m. May 5 between Continental and Canoa roads.

Hoskins, a bartender at American Legion Madera Post 131 and a server at the Coyote Grill, died at the scene along with Edith A. Munoz, 41, and Munoz's sons, Mario A. Gradillas, 24, and Saul E. Gradillas, 19. Services for the family were held Friday.

Angel Gradillas, 14, was ejected from the vehicle and survived. He was taken to the hospital in critical condition. A family member said the middle school student broke both legs and both arms and suffered a head injury.

Graves said Tuesday a 911 call came in just before the collision and another call came in to the DPS dispatch center moments afterward.

According to relatives, the family was their way home to Tucson from Nogales, Sonora, when the crash happened. Angel's grandmother is in poor health and his family routinely visited her.

Edith was a florist, Saul was a server at Michas Restaurant and Mario worked at HomeGoods furniture store.

Statistically speaking, Graves said most wrong-way drivers are impaired by drugs or alcohol.

Trooper Kameron Lee, another DPS spokesman, said the Department of Liquor investigates all wrong-way collisions. As part of the investigation, the department attempts to establish where the drivers were in the hours prior to the collision.

Kim Smith | 520-547-9740


Reporter Kim Smith moved to Arizona from Michigan when she was 16. She graduated from the University of Arizona with a degree in journalism in 1989. She has worked at seven newspapers of varying size in Arizona, Texas and Nevada.

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