Lots go unsolved in the US, and that figure is over 50% in many places. A pretty interesting story with graphics/data interleaved: https://urbanobservatory.map

Lots go unsolved in the US, and that figure is over 50% in many places. A pretty interesting story with graphics/data interleaved: https://urbanobservatory.maps.arcgis.com/apps/Cascade/index.html?appid=984c0b6fbf8e48c7951e7bdcfb64d910 https://urbanobservatory.maps.arcgis.com/apps/Cascade/index....