Ms. Stumpf is experienced with all aspects of accident reconstruction, and has addressed such issues as speed determination, time-distance analysis, impact location/orientation, visibility, seat belt use, trip and fall analysis, and motor vehicle/pedestrian interactions.   Ms. Stumpf is also experienced with the use of accident reconstruction tools such as collision simulation software and photogrammetry; she is adept with integrating new technology with basic physics in order to solve complex problems and provide value-added analysis.