The article says: MacDonald argues that PredPol uses only crimes reported by victims, such as burglaries and robberies, to inform its software. “We never do predictions for crime types that have the possibility of officer-initiated bias, such as drug crimes or prostitution,” he says.
By lesser crimes I don't mean trivial things that provide an excuse to harass non-criminals and give "broken window" policing a bad name, but actual crimes which aren't major violent crimes.