A new "cold case" unit that investigates unsolved homicides in Santa Clara County has already resulted in murder charges being filed in three old cases, prosecutors announced Friday at a news conference. Chief Assistant District Attorney Karyn Sinunu said she decided to form a dedicated two-person unit in the District Attorney's Office earlier this year after two high-profile cold case murders were solved by local authorities. "After the Xiana Fairchild case and the Jeanine Harms case, I decided to form a cold case unit so we could assist our local law enforcement in solving old homicides," Sinunu said. Sinunu announced...