The aunt of an Iowa college student who authorities say was murdered by an illegal immigrant is imploring people not to make assumptions based on the alleged killer’s nationality. “Please remember, evil comes in EVERY color,” Billie Jo Calderwood wrote Tuesday night on Facebook, alongside a black-and-white photo of her 20-year-old niece Mollie Tibbetts. “Our family has been blessed to be surrounded by love, friendship and support throughout this entire ordeal by friends for all different nations and races,” she added. “From the bottom of our hearts, thank you.”