He chose a low-tech, simple life. Now his lack of a digital footprint is hampering the search for his killer.

By 1 p.m., Philip would leave the small yellow house in Silver Spring where he lived alone. He walked a half-block, waited for the No. 5 bus, took it to his job as a taxi dispatcher, returned home, cooked a late dinner, watched Charlie Rose and went to sleep. He never locked his front door and often left it wide open. Part was defiance. This is how I live. Part was warmth. Anyone is welcome.