A dishwasher at the Topgolf in Thornton is accused of ambushing his co-workers in the parking lot, shooting at them a dozen times — killing one — and laughing as he fled the scene, a witness says. Victor Salazar-Guarache, 26, was charged with one count of first-degree murder and two counts of first-degree attempted murder on Friday for the fatal shooting of 22-year-old Bryce Holden, according to the 17th Judicial District Attorney’s Office…