Theo Wilson, a journalist whose coverage of America’s history-making trials from Sam Shepard to John De Lorean made her the dean of trial reporters, died early Friday in Los Angeles. Wilson, whose memoir, “Headline Justice,” was published this week by Thunders Mouth Press, suffered a cerebral hemorrhage as she prepared to give a TV interview about the book Thursday night. She was believed to be about 78, but her age was a closely guarded secret. “A woman who will tell you her age will tell you anything,” she said.