With his own life and the lives of his companions in danger, Eric drew his gun and the one of the criminals fled immediately while the other robber opened fire. Eric returned fire at the robber.
The robber, now identified as Garrick C. Lucas, was struck and was pronounced dead at the scene. Of course, this isn't the movies and the "good guys" don't always win. During the exchange of gunfire another card player, 17-year-old Micah Cave was wounded. He was taken to the hospital and is expected to make a full recovery.
Also struck in the exchange was Eric himself. He was taken to the hospital and pronounced dead.
Lost in the current gun control argument is that all gun owners understand that carrying a gun doesn't guarantee the best outcome for ourselves - we just know it stacks the odds in our favor as best we can.