I deny breaking the speed limit or commenting on some mofo's ethnic background or sexual preferences 38,800 times.
If a copper wants to know how to fix his roof, then I may have a solution. But if it's about how to investigate and solve crime, then I must insist that it would be in his JD to do that.
But if it's unreported how is he t know that it needs investigating? Come to that, if it is unreported how does anyone know they are unreported?