Private Investigator Background Check
In-depth Background Investigations
Inter-State Investigative Services delivers criminal defense background investigations that go beyond surface-level research. When your case demands detailed factual discovery to support defense strategy, our experienced private investigators dig deeper and methodically gathering information that holds up in court and helps defense counsel uncover facts often overlooked by prosecutors.

What Our Background Investigations Include
Comprehensive Background Research
Our criminal defense background investigations pull from state-of-the-industry databases, governmental and public records, and validated research methodologies. Each investigation is structured to reveal relevant facts while upholding evidentiary standards for legal use.
We assess every subject’s history with precision, validating details through:
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Verified court and administrative records
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Police and government contacts
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Social media capture and preservation
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Asset verification and financial mapping
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Character and witness interviews
These methods ensure a complete profile that helps defense counsel refine strategy and identify facts that could influence outcomes.
Critical Evidence and Defense Strategy
Strong background investigations are foundational to criminal defense strategy. They can:
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Identify information that challenges prosecution claims
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Reveal exculpatory evidence or mitigating factors
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Support motions, negotiations, or pre-trial strategy
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Provide context for judge or jury evaluation
Our investigators work seamlessly with defense attorneys to align investigative findings with case goals, helping counsel make informed decisions backed by actionable data.
We never lose sight of what’s at stake — a client’s reputation, legal rights, and personal freedom. Our approach blends meticulous work with ethical rigor, giving defense teams dependable insights and peace of mind.
Our Investigation Philosophy
At Inter-State Investigative Services, we combine:
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Deep investigative experience
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Sophisticated analytical tools
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Rigorous research methodologies
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A relentless commitment to uncovering the truth
With more than 25 years serving Arizona criminal defense cases, we understand the nuances of legal investigations and tailor our approach to each client’s unique circumstances.
We take pride in providing defense teams with investigative reports that are both factually comprehensive and legally defensible — critical qualities when every detail matters.
Trusted And Accredited Investigators
Inter-State Investigative Services is licensed, insured, and accredited with industry organizations, bringing credibility and professionalism to every investigation.


