  One of the most important results in Bloodstain Pattern Analysis (BPA) is the
determination of the area of convergence of blood-drop trajectories. This area
is directly related to the point of origin of the projections and is often
indicative of the point where the main action of a crime has occurred. One of
us has recently proposed a method to statistically characterize this area by
mean of a probabilistic approach based on the uncertainties of the angles of
impact of the stains in the pattern. In our work we present some laboratory
tests that confirm the validity of the method, returning good agreement between
the empirical and the theoretical data. By comparing the results of different
operators, we also show the robustness of the method, in that the results are
independent of the analytical approach of the single experimenter. Finally, we
describe an example of application to a real forensic case.
