Bloodstain Pattern Analysis

I offer bloodstain pattern analysis (BPA) for requesting agencies. Based on physical, mathematical and biochemical properties in accordance with the scientific method, BPA can reveal information pivotal to realistic crime scene reconstruction. BPA can find angles of impact and sequence bloodshed events to determine actor’s location(s), effectively ruling out impossible scenarios.

The general role of the analyst is to identify, collect, preserve, evaluate and document bloodstain patterning found at crime scenes to reconstruct events. Analytical results with corresponding photographic images offer convincing, cogent and concise scientific evidence for courtroom presentation.

My biomedical background e.g., human anatomy/physiology, pharmacology, etc. means that I can effectively liaise with medical examiners. And my special expertise in microscopy is uniquely applicable to examining bloodstains found on recovered physical evidentiary items such as clothing.

BPA set a historical precedent in Alaska. Court decisions include: Crawford v Rogers, 406 P.2d 189 (Alaska 1965); Pederson v State, 420 P.2d 327 (Alaska 1966); Thompson v State, 768 P.2d 127 (Alaska 1989); Marcy v State, 823 P.2d 660 (Alaska 1991).

To the best of my knowledge, unlike other states, there are currently no other BPA analysts in Alaska.

Curious about Bloodstain Pattern Analysis? Please refer to my compiled questions/answers.


  • Hemodynamics
  • Motion and directionality
  • Impact spatter and altered bloodstains
  • Trigonometry: angle of impact, convergence and origin
  • Bloodstain pattern evaluation and documentation
  • Blood detection
  • Courtroom testimony


Dr Amy Du Beau
Anchorage, Alaska
ph. 907-644-2929
c. 907-312-8687


Du Beau A., Matanuska Forensic Science, LLC.