The case of the missing shoe

The other day, I found these nikes for 25% off at the Px for Aiden. He wore them for about 3 days when one of them went missing. We immediately suspected the smallest member of the household due to her shoe fetish and the fact that I once found one of my shoes--quite by accident--in the decorative terracota fireplace in our dining room. Well, we've looked everywhere we can think of for a week now and can't find it anywhere. We tried all the typical interrogation techniques with her and nada. We cringe to think she may have put it in the trash, thinking she was helping out somehow, and now it's gone. What to do with one nice shoe and that sinking feeling in your stomach knowing you just threw money in the trash--literally?