JANESVILLE A Janesville police officer responded to a report of shots fired early Monday morning and found 12 shell casings in a driveway. No one would admit to firing the rounds. The officer also found illegal fireworks at the scene on Greenwood Drive on the cityâs east side and cited a woman for possessing them. That was one of about 20 municipal citations issued for fireworks possession over the long holiday weekend. Police Lt. Mike Blaser said Tuesday he didnât have comparison figures, but officers thought that was more than usual. The incidents might seem like harmless fun to some, but officers had to consider that when someone reports illegal fireworks in their neighborhood, they might actually be hearing gunshots, Blaser said.