FoCoSS Forensics

About Us

  Our Company and Mission

  Our Scientists

Services

  Case Review

  Case Work

  Verifications

  Trial Preparation

  Expert Testimony

  Technical Training

  Audits and Assessments

Areas of Expertise

  Fingerprints

  Firearms

  Toolmarks

  Physical Match

  Serial Numbers

  Gunshot Residue

  Crime Scene

  Glass

  Trace Evidence

  Drug Chemistry

  Impression Evidence

  SEM/EDS

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  Schedule a Class

FoCoSS News

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Contact Us

P.O. Box 604
Concord, NH 03302-0604
Phone: 603.568.0713
      603.568.2668
info@focossforensics.com

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Scientists1

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.

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Click logos for Certification Information

Marc E. Dupre

Marc E. Dupre has thirteen 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) 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 Testing and Evaluation, Bullet and Cartridge Case Comparisons, Tool Mark 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 2500 cases in his career.

Click here for Marc Dupre’s CV

Stephen H. Ostrowski

Stephen H. Ostrowski has nine 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) accredited laboratory, where he is currently employed as a Senior Criminalist working in the Identification Unit and the Firearms/Toolmark Unit.  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. 

Stephen’s areas of expertise include:  Latent Impressions (finger, palm and foot friction ridge skin), Patent Blood Impression Enhancement, Firearms Testing and Evaluation, Bullet and Cartridge Case Comparisons, Tool Mark 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 1700 cases in his career.

Click here for Stephen Ostrowski’s CV

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