A street race in Mission Viejo, California, ended tragically Thursday night with the death of a 21-year-old mother and the arrest of her younger brother.

Shalia Deciderio was a passenger in a Nissan Infiniti that veered off the road and struck a tree near Los Alisos Boulevard and Mustang Run around 9:41 p.m. She was pronounced dead at the scene.

The driver of the Infiniti, 20-year-old Jaime Rojas, sustained critical but stable injuries and remained hospitalized. Deciderio's brother, 20-year-old Aiden Deciderio, was allegedly driving a second Nissan Infiniti and racing Rojas's vehicle at the time of the crash.

A makeshift memorial with flowers has been placed at the site of the crash. The base of a tree with a white heart that says "Love You" on it, marking the location of a fatal street racing crash in Mission Viejo.

Aiden Deciderio was arrested Friday morning on suspicion of vehicular manslaughter with gross negligence in his sister's death. Rojas is expected to face similar charges upon his release from the hospital.

A GoFundMe campaign has been established to help cover Shalia Deciderio's funeral expenses and to provide for her young child. The fundraiser states that Deciderio was a "loving, caring, vibrant, and outgoing person" whose loss has left an "unimaginable emptiness." As of Saturday morning, more than $4,700 had been raised toward a $13,000 goal.