Gene Maddaus Senior Media WriterFrom his office window, attorney Jon Katz has a direct view of the Fairfax County Courthouse in Virginia, and for the past several weeks, he has watched fans gathering outside to catch a glimpse of Johnny Depp.The trial pitting the “Pirates of the Caribbean” star against his ex-wife, Amber Heard, is the biggest case Katz can recall in 20 years of practicing criminal defense in the area. He also does free-speech work — clients have included strip clubs, adult toy shops and the Westboro Baptist Church — so he has a professional stake in the outcome.“I want a verdict against both of them,” he says.Depp and Heard are suing each other for defamation. Depp alleges that Heard destroyed his career when she accused him of domestic violence.