FIS 201 – Exam 3 Study Guide: Blood spatter (Mohr,
WVU)
Satellite spatter - ANS✔✔ Blood spatter around the parent stain, with blood droplets whose
pointed ends face against the direction of travel.
Angle of impact - ANS✔✔ The angle of the source of the blood to the surface where it was
deposited. It can be estimated from the width to length ratio of the stain to help determine the
position of the victim or the weapon at the time when the bleeding wound was inflicted.
Impact spatter - ANS✔✔ A bloodstain pattern produced when an object makes forceful contact
with a source of blood, projecting droplets of blood outward from the source.
Forward spatter - ANS✔✔ Blood that travels away from the source in the same direction as the
force that caused the spatter.
Back spatter - ANS✔✔ Blood directed back toward the source of the force that caused the
spatter.
Low-velocity spatter - ANS✔✔ An impact spatter pattern created by a force traveling at 5 ft./s or
less in producing drops with diameters of greater than 4 mm.
Medium-velocity spatter - ANS✔✔ An impact spatter pattern created by a force traveling at 5 to
25 ft./s and producing drops with diameters of between one and 4 mm.
High-velocity spatter - ANS✔✔ And impact spatter pattern created by a force traveling at 100
ft./s or faster and producing droplets with diameters of less than 1 mm.
WVU)
Satellite spatter - ANS✔✔ Blood spatter around the parent stain, with blood droplets whose
pointed ends face against the direction of travel.
Angle of impact - ANS✔✔ The angle of the source of the blood to the surface where it was
deposited. It can be estimated from the width to length ratio of the stain to help determine the
position of the victim or the weapon at the time when the bleeding wound was inflicted.
Impact spatter - ANS✔✔ A bloodstain pattern produced when an object makes forceful contact
with a source of blood, projecting droplets of blood outward from the source.
Forward spatter - ANS✔✔ Blood that travels away from the source in the same direction as the
force that caused the spatter.
Back spatter - ANS✔✔ Blood directed back toward the source of the force that caused the
spatter.
Low-velocity spatter - ANS✔✔ An impact spatter pattern created by a force traveling at 5 ft./s or
less in producing drops with diameters of greater than 4 mm.
Medium-velocity spatter - ANS✔✔ An impact spatter pattern created by a force traveling at 5 to
25 ft./s and producing drops with diameters of between one and 4 mm.
High-velocity spatter - ANS✔✔ And impact spatter pattern created by a force traveling at 100
ft./s or faster and producing droplets with diameters of less than 1 mm.
