Shalia Deciderio, 21, of Rancho Santa Margarita Killed in Mission Viejo Street Racing Crash

Shalia Deciderio, 21, of Rancho Santa Margarita Killed in Mission Viejo Street R. August 22, 2026.

Updated Aug 22, 2026
CRITICAL INCIDENT
Reported
Updated
Source
NY Post
Shalia Deciderio, 21, of Rancho Santa Margarita Killed in Mission Viejo Street Racing Crash

What Happened

Shalia Deciderio, 21, of Rancho Santa Margarita was killed Thursday night when the Nissan Infiniti she was riding in left the road and slammed into a tree near Los Alisos Boulevard and Mustang Run in Mission Viejo, Orange County. The crash was reported at 9:41 p.m. Deciderio was pronounced dead at the scene, according to the New York Post.

The car’s driver, 20-year-old Jaime Rojas of Mission Viejo, survived. He was in critical but stable condition following the crash.

Investigators say the Infiniti Rojas was driving was street racing a second Nissan Infiniti at the time of the crash. That second car was driven by Aiden Deciderio, 20, Shalia’s younger brother. Aiden stayed at the scene after the crash, according to the New York Post.

Aiden Deciderio was arrested and booked Friday morning. Rojas is expected to be booked on the same potential charges after his release from the hospital. Both men face potential charges of vehicular manslaughter with gross negligence in Shalia’s death, per KTLA.

Shalia Deciderio leaves behind a young child. A GoFundMe campaign was launched to cover her funeral expenses and to help support the child. “Shalia was a loving, caring, and outgoing person whose beautiful spirit touched everyone fortunate enough to know her,” the fundraiser states. “Shalia also leaves behind a precious young child, who is now facing life without a parent.” As of Saturday morning, the campaign had raised more than $4,700 of its $13,000 goal.

A makeshift memorial with flowers appeared at the crash site near Los Alisos Boulevard and Mustang Run.

Location & Road Context

The crash happened at the intersection of Los Alisos Boulevard and Mustang Run in Mission Viejo, a residential city in southern Orange County. The vehicle left the roadway at that junction before striking a tree. Mission Viejo is approximately 60 miles south of Los Angeles.

Aiden Deciderio, 20, was arrested and booked Friday morning following his sister’s death. He faces potential charges of vehicular manslaughter with gross negligence under California law. Jaime Rojas, 20, of Mission Viejo faces the same potential charge and is expected to be booked once he is discharged from the hospital, according to KTLA as reported by the New York Post. No arraignment date had been announced as of Saturday morning.

Broader Impact

Under California Penal Code § 192(c), vehicular manslaughter with gross negligence carries a sentence of up to six years in state prison. Both Aiden Deciderio and Jaime Rojas face that charge in connection with Shalia Deciderio’s death.

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Frequently Asked Questions

Where did this crash happen?

The crash occurred near the intersection of Los Alisos Boulevard and Mustang Run in Mission Viejo, Orange County, California. The Nissan Infiniti left the roadway and struck a tree at that location around 9:41 p.m. Thursday.

Who was involved in the Mission Viejo street racing crash?

Shalia Deciderio, 21, of Rancho Santa Margarita was killed. She was a passenger in a car driven by Jaime Rojas, 20, of Mission Viejo, who survived in critical but stable condition. Her brother Aiden Deciderio, 20, was driving the second car allegedly racing Rojas and was arrested the following morning.

What charges does Aiden Deciderio face?

Aiden Deciderio faces potential charges of vehicular manslaughter with gross negligence in his sister Shalia's death, according to KTLA. He was arrested and booked Friday morning after remaining at the scene following the crash.

What happened to Jaime Rojas after the crash?

Rojas, 20, of Mission Viejo survived the crash in critical but stable condition. He is expected to be booked on potential charges of vehicular manslaughter with gross negligence after his release from the hospital, per KTLA.

Did Shalia Deciderio leave behind any children?

Yes. Deciderio leaves behind a young child. A GoFundMe campaign was launched to cover her funeral expenses and help care for the child, with more than $4,700 raised toward a $13,000 goal as of Saturday morning.

Was a GoFundMe set up for Shalia Deciderio's family?

Yes. A GoFundMe was launched to cover Shalia Deciderio's funeral costs and support her young child. As of Saturday morning, the campaign had raised more than $4,700 of its $13,000 goal. A makeshift memorial with flowers also appeared at the crash site on Los Alisos Boulevard.

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