After a U.S. Immigrations and Customs Enforcement officer shot and killed Renee Nicole Good in Minneapolis last week, rival GoFundMe campaigns emerged. One raised $1.5 million for the family of the slain mother of three. Another has pulled in nearly half a million dollars for Jonathan Ross — the ICE agent who killed her. Among the donors to the Ross GoFundMe was billionaire hedge fund manager Bill Ackman, who shared a post about the fundraiser on Saturday and donated $10,000. The fundraising campaign for Ross was created by an account using the name of Clyde Emmons, of Michigan. Other online...