Over the course of the last week, two homeless men have been shot to death in Atlanta. The murders took place two days apart, and the victims were both shot multiple times, late at night, while sleeping outdoors. The similarities of the crimes have led investigators to fear that someone is targeting the homeless. Robert Rosenberger is an assistant professor of philosophy in the School of Public Policy. He’s written about the effects of public space design on the homeless population, designs that have safety implications.