Something wild went down at a Nebraska Walmart over the weekend, and authorities say William Eckman, 20, is behind it. The incident reportedly forced shoppers and staff to evacuate as flames tore through part of the store. And it's left a community shaken, and investigators putting the pieces together.RELATED: Cause Of Death Reportedly Revealed For Slain Carnival Cruise Teenager As More Claims Surface About Her StepbrotherMan Confessed To Starting Walmart FireAccording to local reports, the fire broke out around 11:27 a.m. on Sunday, prompting a call to the York Police Department.