The use of Bayesian approach in forensic science requires the evaluation of likelihood ratio related to the crime scene evidence (denoted as event E) and the suspect characteristic (denoted as event C). This evaluation is trivially naught when the two events are disjoint, and it is a fraction...

The use of Bayesian approach in forensic science requires the evaluation of the likelihood ratio related to the crime scene evidence event E and the suspect characteristic event C. This evaluation fails when the two events are disjoint, i.e. the evidence E is not compatible with the...