Investigative Services, LLC 660 Central Ave 2nd Floor Dover, NH 03820 US

(603) 742-6669






Co-Owner & Senior Investigator

Frank Santin started his investigative background after enlisting in the US Air Force as a military policeman in January 1975. He is a Vietnam Era veteran and after 4 years of service he was honorably discharged as a Staff Sergeant.

Frank then embarked on a 24 year civilian law enforcement career with the Dover, NH Police Department reaching the rank of Lieutenant. He most notably was assigned as the Commander of the Detective Bureau and followed it with many years as a Police Prosecutor. During his tenure with the Dover Police Dept., Frank served as an instructor at the NH Police Academy for 18 yrs, specializing in the investigation of sex crimes and DWI enforcement.

As co-owner of Investigative Services, he brings to the business over 43 years of criminal investigative experience involving all major offenses. Frank provides extensive knowledge in cases involving Homicide, Sex Offenses, Drugs, and Robbery. He provides Law Firms and individuals with field investigations, analysis, and expert testimony.




Co-Owner & Senior Investigator

Sue Smith began her investigative career in 1986 as an undercover operative for a major Boston based security and investigative firm. During this time, she investigated corporate theft, employee drug dealing, and many other illegal activities within a variety of New England based corporations and businesses.

She has successfully operated her own private investigative company since 1989 and earned an exceptional reputation as a thorough and professional investigator, an effective interrogator, and an advocate for women and children who are victims of abuse, sexual assault and abandonment.

As co-owner of Investigative Services, Sue brings over 33 years of experience as a multi-state investigator and expertise in undercover operations and civil/marital investigations.


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Investigative Services, LLC 660 Central Ave 2nd Floor Dover, NH 03820 US

(603) 742-6669