Meet Our Experts

Tom “Grif” Griffin served 27 years with the Colorado Bureau of Investigation (CBI) as a
criminal investigator and laboratory agent. While there, he provided analysis and
testified as an expert witness in Colorado district courts and federal courts on bloodstain
pattern analysis (BPA), crime scene reconstruction (CSR), shooting incident
reconstruction (SIR), and crime scene investigation (CSI), as well as the forensic
analysis of fire debris, controlled substances, and primer residue (GSR). 

Before joining CBI, he worked as a criminalist and crime scene investigator with the
Greeley, Colorado, Police Department for four years. As a partner at BGA, he continues
casework and testimony in BPA, CSR, and SIR, and instructs BPA and CSR classes
across the United States.

Griffin is International Association for Identification (IAI) certified as a Senior Crime
Scene Analyst (CSCSA) and a Bloodstain Pattern Analyst (CBPA). He served for
several years on the IAI Bloodstain Pattern Certification Board and then two terms on
the IAI Crime Scene Certification Board. He is a Distinguished Member of the IAI and a
recipient of the IAI’s Good of the Association Award. He serves on the Organization of
Scientific Area Committees (OSAC) Bloodstain Pattern Analysis Subcommittee. Griffin
was a charter member of the Scientific Working Group on Bloodstain Pattern Analysis
(SWGSTAIN) and served as that group’s vice chair during its existence. He has served
as president of the International Association of Bloodstain Pattern Analysts (IABPA) and
as a Distinguished Member of that association. Griffin has also served as president of
the Association for Crime Scene Reconstruction (ACSR), the Rocky Mountain Division
of the IAI, and the Rocky Mountain Association of Bloodstain Pattern Analysts
(RMABPA), and has served on various committees for these associations. He is also a
member of the Southwestern Association of Forensic Scientists (SWAFS) and an
affiliate of The Chartered Society of Forensic Sciences of the United Kingdom. 

Griffin is a founding member and former president of NecroSearch International, a
group dedicated to detecting clandestine graves, and serves as a permanent member of
its board of directors. He has co-authored articles on detecting clandestine graves,
investigating mass crime scenes, and analyzing bloodstain patterns. He has taught at
bloodstain pattern workshops at the annual IAI educational conferences since 2000. He
has been a featured speaker at presentations in Canada, the United Kingdom, the
People’s Republic of China, and throughout the United States. He also regularly
instructs on various aspects of crime scene investigation at law enforcement academies
in Colorado. Grif continues to participate in seminars and training programs to stay
current with advancing techniques and technologies.