PASSION. EXPERIENCE. DILIGENCE.

Located in Greater Cincinnati, the Salvatore A. Grasso Co. with its nationwide reach have been a trusted name in private investigations and risk advisory since 1992. Leading Salvatore A. Grasso Co. is Salvatore Grasso, a many decades' strong veteran private eye with a reputation for his brutal thoroughness. Mr. Grasso believes that true intelligence is about more than just data—it’s about clarity and confidence. Mr. Grasso demands excellence from his ...

Since 1992, the Salvatore A. Grasso Co. has been delivering precision-driven services to meet the unique needs of our diverse clientele. From surveillance that uncovers hidden truths to due diligence investigations that ensure informed decision-making, our offerings are crafted with the utmost care and expertise. Our criminal defense support provides critical insights that strengthen cases, while our background investigations reveal the information you ...

Rooted in a tradition of strong values and driven by a passion for relentless accuracy, we have dedicated decades to providing clarity and guidance to our clients. From the beginning, our philosophy has been simple yet profound: your problem becomes our priority. Our dedication is more than procedural — it’s personal. We pursue the truth with tireless focus, ensuring no detail is overlooked and no client left uncertain. We serve — protecting what matters ...

What Our Clients Say About Us

Google Reviews

Bruce Gerstman
I work with investigators all the time throughout the country. Sal Grasso is really is as good as they get. Literally an A+ with everything. Sal is...  Read more
Sep 19, 2025
Randall Alley
I hired Sal to investigate a closed legal issue from several years ago when suddenly a major new development and information was discovered. Sal...  Read more
Sep 14, 2025
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Services

What We Do

What We Do

Surveillance

Cheating. Infidelity. Business. Surveillance is a crucial tool for gathering information …
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Due Diligence

Due diligence is essential when making critical decisions that could have far-reaching …
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Background Investigations

Background investigations are invaluable for making informed decisions in both personal …
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Criminal Defense

Criminal defense investigations play a pivotal role in ensuring that every client …
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Child Custody

Often adversarial, child custody investigations are an important part of family law …
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Asset Tracing

Divorce. Fraud. Debt Recovery. Crucial in litigation, or in the anticipation of …
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