Criminal Cases | Phoenix and Tucson Private Investigator



Our passion for criminal defense is unparalleled in the investigative industry. As the top private investigators, we fundamentally believe in everyone’s right to the best possible legal defense. Anyone who’s ever been falsely accused of a crime can appreciate our philosophy. And so can their attorneys. Attorneys in Arizona who are looking for an edge over monolithic prosecutorial powers consistently rely upon Inter-State Investigative Services to help establish and build their cases. Our work with The Arizona Justice Project is just one example of our tireless efforts on behalf of the wrongfully accused.

With over 20 years of criminal defense investigative experience, we’re familiar with all of the court systems in the state. We have a firm grasp on the entire legal process of criminal cases. We know what kind of evidence is needed, which witnesses are paramount, and how to gather every fact in a way that survives judicial scrutiny. The most brilliant legal scholar is powerless without supporting facts. We’re here to help anyone who needs the most effective and efficient investigative efforts on behalf of someone charged with a crime.

While no means exhaustive, below you’ll find a list of the most commonly requested criminal defense investigative services we proudly provide (click any of the links for a concise overview of our approach to each service):

Discovery review and analysis

Defense theory development

Case strategy

Discovery development

Witness development and interviews

Witness nullification

In-depth background investigations

Evidence collection, review, analysis and storage

Scene recreation

Trial preparation and assistance

Exhibit preparation

Witness preparation

Jury selection


InterState Investigative Services, Inc is a BBB Accredited Investigator in Tucson, AZ

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