Inter-State Investigative Services is a private investigation agency based in Arizona. For more than thirty years, Inter-State Investigative Services has been the go-to source for clients seeking reliable, accurate information delivered with efficiency. Our commitment to excellence has empowered countless business and legal professionals to make informed decisions with confidence. 

Licensed and insured investigators in Phoenix, Tucson, Flagstaff, and Nogales, capable of servicing all surrounding areas promptly and often without significant travel expenses. 

We specialize in complex cases and offer services tailored to your specific situation. Our expertise includes criminal defense, civil and insurance investigations, social media investigations, witness interviews, and more.

Inter-State Investigative Services

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