A method and system for a public safety investigation relating to a plurality of vehicles is disclosed. The method is carried out at least in part at a first location where at least one of a first vehicle and a second vehicle is parked, stationed or stopped. Based on a learning machine identifying one or more relationship link thresholds for the first and second vehicles having being met, a plurality of police officers, identified from both first and second police reports, are automatically assigned into a communications group (which is ad hocly created). The method also includes providing a notification to each of the assigned police officers that provides at least one implicit or explicit explanation for the automatic assigning to the communications group.