News Summary
A tragic incident unfolded in Costa Mesa when 15-year-old Allison Castillo was fatally stabbed, leading to the arrest of 31-year-old Matthew Juarez, a suspected gang member. The violent attack, believed to be gang-related, has left the community in shock. Allison, a promising student and soccer player, succumbed to her injuries after being found by emergency responders. The police have launched an investigation and are seeking information from the public to understand the circumstances surrounding this senseless violence and to ensure justice for Allison and her family.
Costa Mesa Police Arrest Suspected Gang Member in Fatal Stabbing of Teenager
Costa Mesa witnessed a tragic incident on August 9, when 15-year-old Allison Castillo was fatally stabbed around 12:30 p.m. in the 700 block of Shalimar Drive. The police have classified this violent attack as gang-related, leading to the swift arrest of Matthew Juarez, a 31-year-old suspected gang member from Anaheim, on the same day.
Allison Castillo was found on the ground suffering from a life-threatening stab wound. Emergency responders, including police officers and paramedics, performed CPR at the scene before she was rushed to a nearby hospital, where she ultimately succumbed to her injuries. Castillo had been a bright student at Newport-Mesa Unified School District and was actively engaged in soccer, having recently been accepted to play in Spain, a significant achievement that has now been tragically overshadowed by her death.
The police, aware of Juarez’s previous involvement in illegal gang activities, acted quickly to apprehend him in connection with the stabbing. The ongoing investigation into the circumstances surrounding the incident remains a top priority for the Costa Mesa Police Department. Detectives are actively seeking information and have encouraged anyone with knowledge of the events to contact Detectives Peralta or Molina.
Community Response
The local community has been left reeling in the wake of this event. Family members of Allison Castillo have described her death as a senseless act of violence and remembered her as someone full of life with dreams of a promising future. Known for her vibrant personality and competitive spirit, she was characterized as “the life of the party” who sparked joy among her friends and family.
In light of this tragic loss, a GoFundMe campaign has been established to help cover funeral costs. The family is also vocal about their desire for justice for Allison as they seek answers surrounding the case and how the suspect intersected with their daughter’s life. Community support has been palpable, with schools offering counseling and support services to help students and families navigate this difficult time.
Investigation and Future Steps
The police investigation is ongoing, aiming to gather more details regarding the incident and any potential motives. The community remains urged to come forward with any relevant information that could assist detectives in piecing together the circumstances of the tragic stabbing.
As Costa Mesa deals with the aftermath of this violent episode, the loss of a young talent like Allison Castillo serves as a stark reminder of the impact of gang-related violence, particularly on innocent lives. The police department, along with the community, is committed to ensuring justice is served as they navigate the complexities of this heartbreaking situation.
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Additional Resources
- Los Angeles Times
- Wikipedia: Gang Violence
- Fox LA
- Google Search: Costa Mesa gang violence
- ABC 7 News
- Google Scholar: Gang Related Violence
- CBS News
- Encyclopedia Britannica: Growing Up in Gangs
- KTLA News

Author: STAFF HERE COSTA MESA WRITER
COSTA MESA STAFF WRITER The COSTA MESA STAFF WRITER represents the experienced team at HERECostaMesa.com, your go-to source for actionable local news and information in Costa Mesa, Orange County, and beyond. Specializing in "news you can use," we cover essential topics like product reviews for personal and business needs, local business directories, politics, real estate trends, neighborhood insights, and state news affecting the area—with deep expertise drawn from years of dedicated reporting and strong community input, including local press releases and business updates. We deliver top reporting on high-value events such as the OC Fair, Concerts in the Park, and Fish Fry. Our coverage extends to key organizations like the Costa Mesa Chamber of Commerce and Boys & Girls Clubs of Central Orange Coast, plus leading businesses in retail, fashion, and technology that power the local economy such as Vans, Experian, and South Coast Plaza. As part of the broader HERE network, including HEREAnaheim.com, HEREBeverlyHills.com, HERECoronado.com, HEREHollywood.com, HEREHuntingtonBeach.com, HERELongBeach.com, HERELosAngeles.com, HEREMissionViejo.com, HERESanDiego.com, and HERESantaAna.com, we provide comprehensive, credible insights into California's dynamic landscape.