We propose a solution to the Vehicle-Born Improvised Explosive Device problem. This solution is based on a modelling by belief functions, and involves the construction of a combination rule dedicated to this problem. The construction of the combination rule is made possible by a tool developped in previous works, which is a generic framework dedicated to the construction of combination rules. This tool implies a tripartite architecture, with respective parts implementing the logical framework, the combination definition (referee function) and the computation processes. Referee functions are decisional arbitrament conditionally to basic decisions provided by the sources of information, and allows rule definitions at logical level adapted to the application.We construct a referee function for the Vehicle-Born Improvised Explosive Device problem, and compare it to reference combinaton rules.