the guy has been robbed a couple of times before and decided to place a purse in his garage - garage doors wide open. when the motion sensors he installed earlier turned on he run in and cleaned the garage with a couple of shotgun shots which injured the german exchange student deadly.
i bet the student just saw a purse in an open garage and wanted to bring it to the house owner... that's the kind of stuff germans would do in this situation. :/
deadly culture clash. :/