A moving person who is losing blood will leave blood stains that provide information about the direction in which the person is traveling. A number of factors may determine if an investigator can follow a victim's trail.


Gives Insight

Gives No Insight

shape of blood stains

oval (with long axis indicating axis of motion)


spines and satellite splashes

obvious and on one side

none or all around the stain

number of stains



surface stained


rough and irregular


The direction of a victim's movements can usually be determined if several of the features giving insight are present.


Footprints and other evidence may provide additional support for the interpretation.


One method of using this data is to assign points to the results (0 if no information, 1 if some information, 2 if informative) then summing the value.


To read more or access our algorithms and calculators, please log in or register.