APPLETON, WI (WTAQ-WLUK) — An Appleton resident is facing charges after a bullet penetrated their neighbor’s wall in a firearm mishap. It happened Sunday morning when officers were dispatched to a residence after the residents reported a bullet was fired into their home. Officers quickly determined the round had been fired from an adjoining residence and had penetrated a shared interior wall. The investigation revealed that an individual in the neighboring unit had been demonstrating basic firearm handling to two others in preparation for a planned trip to a shooting range. The Appleton Police Department encourages all gun owners and anyone handling a firearm to follow the core rules of firearm safety: