With the score tied 1-1, Richards and Loui Eriksson broke into the Columbus zone. Eriksson fed a pass to Richards who launched a snap shot from the left circle that eluded Mathieu Garon 6:17 into the period.
Richards also scored a power-play goal in the first period, snapping a five-game goal drought, and Kari Lehtonen made 35 saves for the Stars.
Fedor Tyutin got the only goal in Columbus's fourth straight loss and Garon ended by making 21 saves.
The Giudices celebrate Easter as they prepare for jail
Administration delays decision on Keystone XL once more