The fatal shooting of a young Democratic Party aide named Seth Rich early in the morning of July 10, 2016, brought incalculable loss to his parents. Within days, Joel and Mary Rich then had to endure an unimaginable, additional blow: the eruption of a cottage industry of conspiracy theories and outright lies around their son's life and death. Police in Washington, D.C., never identified his killer, and there was a vacuum of reliable information. Hot takes, destructive speculation and false claims about Seth rocketed around the internet and found a warm embrace on many Fox News shows. "We're just beside...