A portrait of Rittenhouse Square, 24 hours after a shooting

It was 9:30 p.m., exactly 24 hours since a 17-year-old had walked into the park, attempted to rob a couple, and shot a man who tried to intervene. But for the buskers who line the center square and the couples strolling through on dates and the neighbors walking dogs, it was just Wednesday night.

Now, Matthew sat in the same spot on the concrete wall, as someone whirled around the square with a guitar in hand and a friend leaned her head on his shoulder and begged a cigarette. Matthew said he wasn't nervous, even though the shooter is still out there. "I figure it's an isolated incident," he said. Police say the gunman knew the couple he tried to rob.