They are not classified as crime against person, crime against property, or crime against society.

The IRIs for this file seem to end in randomized strings, e.g "R1PY9E13YhPhV7QvMke50C". Was there a reason you those this strategy over, say, the more standardized namespace+incrementing 7 digit, strategy?

NIBRS is a very interesting, useful, source for content, but I think you should stick less closely to the labels, at least when using rdfs:label. For one, several labels are plural in the ontology, which engenders confusion. For another, it's in my experience been good practice to use rdfs:label for the ontologically precise label, and skos:prefLabel for the user's preferred label, that perhaps in this case being the label provided by NIBRS.