Bloodstain Pattern Analysis

A forward spatter impact pattern in blood on a vertical surface created by a bullet
Bloodstain pattern analyst report
Expiration bloodstain pattern on a vertical surface created by a forensic consultant

We analyze bloodstained scenes and prepare bloodstain pattern analysis reports that document the types of patterns in the scene. The analysis attempts to reconstruct the sequence of events based on the patterns in context within the scene. The report will document the bloodstain pattern expert’s opinions and conclusions. Below are some areas a blood spatter expert can determine.

  • A general area in three-dimensional space where where an impact occurred
  • The minimum number of blows a person received
  • The type of object or event that created the bloodstain pattern
  • The general location of a person or object during bloodshed
  • The minimum number of swings from a bloody object
  • The angle at which bloodstains impacted a surface
  • The direction in which liquid blood was traveling before impacting a surface
  • A change in the speed of a bleeding person moving about
  • The movement of the involved parties during and after bloodshed
  • The sequencing of events
  • The general location of a person swinging a bloody object
  • Provide insight into the wounding mechanism or object based on the bloodstain patterns
  • If the patterns and stains support the testimonial evidence

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