Accusing prosecutors of a "shameful" campaign to intimidate witnesses and obtain unjustified convictions, a federal judge threw out high-profile criminal stock fraud charges against Broadcom Corp. co-founder Henry T. Nicholas III and the company's former chief financial officer. U.S. District Judge Cormac J. Carney issued his ruling Tuesday, less than a week after he overturned a guilty plea by company co-founder and Anaheim Ducks owner Henry Samueli.The judge also dismissed a civil lawsuit that the Securities and Exchange Commission had filed against Broadcom executives, wiping away misconduct allegations that had plagued the Irvine-based microchip giant for years. Samueli and Nicholas,...