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California & Arizona Fire Investigators

Leading Origin and
Cause Fire Investigation

Comprehensive fire investigation services, including expert witness testimony, in-house
laboratory testing, and ignitable liquid detection canines. Same-day response available
throughout California and Arizona.

Whether you manage claims, own property, or handle legal matters, finding the true cause of a fire is critical. Our expert investigations provide clear, science-based answers to support informed decisions and protect your interests.

Advanced In-House Laboratory Capabilities

We are Committed to
Delivering

Our team combines decades of fire service experience with cutting-edge investigative technology, expert testimony, and thorough analysis to deliver origin and cause determinations that stand up in court and support critical claim decisions.

Advanced In-House Laboratory Capabilities

Digital X-ray imaging, high-resolution microscopy, and vehicle inspection facilities eliminate delays and provide comprehensive evidence analysis under one roof.

Immediate Ignitable Liquid Detection

On-staff detection canines provide same-day accelerant screening at no additional cost, streamlining investigations and reducing case timelines.

Proven Court-Ready Results

With a track record of winning results, our investigators deliver powerful testimony and precise documentation that stand up in court and drive successful claim resolutions.

Hear Directly
From Real Clients.

I started working with Reliant when I was hired at my law firm. It was not long before I realized why RI is the go-to O&C for most of our cases…

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Heather N. 

Attorney

As a Senior Claims Examiner with years of experience handling large loss complex property claims, I can confidently say that Reliant…

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Anonymous
Senior Claims Examiner

What truly sets Reliant apart is their commitment to timely and transparent communication. Their reports are not only delivered promptly but are…

Read More

Karl W.
Senior Claims Examiner

Our Services

Why Choose Us

Our comprehensive capabilities ensure faster results, stronger evidence, and successful claim outcomes.

When fire investigations determine liability for millions of dollars in claims, accuracy isn’t optional—it’s essential. Insurance companies and attorneys across California and Arizona trust Reliant Investigations because we deliver the scientific evidence and expert testimony needed to make confident claim decisions. Our comprehensive approach combines advanced in-house laboratory capabilities, certified and extensively skilled investigators, and ignitable liquid detection services that competitors simply cannot match.

Unlike investigation firms that rely on third-party laboratories and outsourced services, we maintain complete control over your evidence from scene examination through final reporting. Our certified and extensively skilled investigators have established a proven track record in legal proceedings, ensuring that every case is thoroughly documented and defensible. With over 700 claims investigated annually and strategic licensing in key markets, we provide the reliability and expertise that insurance professionals demand.

Areas We Serve

At Reliant Investigation, we are proud to serve communities in both California and Arizona.

California Statewide Coverage

Licensed throughout California, including: 

  • Los Angeles
  • San Francisco
  • Sacramento
  • San Diego
  • Fresno
  • San Jose
  • Oakland
  • Lake Tahoe
  • Redding
  • Bay Area

We also serve all other counties across California.

Arizona Investigation Services

Full service coverage throughout Arizona with rapid response capabilities and local expertise.

Contact Us Today to
Request Fire Investigation Services

California Conference
National Association of Fire
International Association of Arson Investigators
NFPA

When your fire investigation cases demand accuracy, advanced technology, and expert witness capabilities, trust the team that insurance companies rely on across California and Arizona. Our comprehensive approach delivers the scientific evidence and courtroom testimony you need for confident claim decisions.

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