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supervising scientists

Supervising Scientists

The scientists at FoCoSS Forensics are the only criminalists in the world who have achieved multiple international certifications in the forensic disciplines of fingerprints, firearms, tool marks and gunshot residue.

Marc Dupre - Focoss Forensics Marc E. Dupre

Marc Dupre has 22 years of forensic experience with the New Hampshire State Police Forensic Laboratory in Concord, New Hampshire, an American Society of Crime Lab Directors /Laboratory Accreditation Board (ASCLD/LAB)-International accredited laboratory, where he is currently employed as the Identification Unit and Firearms/Toolmark Unit Supervisor.  He is certified by the International Association for Identification (IAI) as a Certified Latent Print Examiner.  Additionally, he is certified by the Association of Firearm and Tool Mark Examiners (AFTE) in the areas of Firearms Examination, Tool Mark Examination and Gunshot Residue/Distance Determination.

Marc's areas of expertise include:  Latent Impressions (finger, palm and foot friction ridge skin); Patent Blood Impression Enhancement; Firearms Evaluation and Testing; Bullet and Cartridge Case Comparisons; Tool and Toolmark Examination and Comparisons; Shooting Scene Reconstruction; Powder and Primer Gunshot Residue; Range of Shooting Distance Determination; Obliterated Serial Number Restoration; Physical/ Fracture Match; Indented Writing Restoration; Questionable Pattern Interpretation; Drug Chemistry; and Glass Examination.  

He has worked over 3000 cases in his career.

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Stephen H. Ostrowski

Stephen Ostrowski - Focoss Forensics Stephen Ostrowski has 18 years of forensic experience with the New Hampshire State Police Forensic Laboratory in Concord, New Hampshire, an American Society of Crime Lab Directors /Laboratory Accreditation Board (ASCLD/LAB)-International accredited laboratory, where he is currently employed as a Senior Criminalist working in the Identification Unit and the Firearms/Toolmark Unit, as well as, overseeing the lab’s crime scene response.  He is certified by the International Association for Identification (IAI) as a Certified Latent Print Examiner.  Additionally, he is certified by the Association of Firearm and Tool Mark Examiners (AFTE) in the areas of Firearms Examination, Tool Mark Examination and Gunshot Residue/Distance Determination.

Steve’s areas of expertise include:  Latent Impressions (finger, palm and foot friction ridge skin); Patent Blood Impression Enhancement; Firearms Evaluation and Testing; Bullet and Cartridge Case Comparisons; Tool and Toolmark Examination and Comparisons; Shooting Scene Reconstruction; Powder and Primer Gunshot Residue; Range of Shooting Distance Determination; Obliterated Serial Number Restoration; Physical/ Fracture Match; Indented Writing Restoration; and Questionable Pattern Interpretation.  He has worked over 3000 cases in his career.

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Email Stephen