Mistrial ends murder case against Ariz. border agent A judge in Tucson declared a second mistrial in the high-profile murder prosecution of a Border Patrol agent. A defense attorney said he was told that prosecutors will not seek a third trial. The mistrial on Tuesday left Border Patrol agents feeling vindicated and human-rights groups worried that violence against illegal immigrants on the border could increase. The jury in the two-week-long retrial of agent Nicholas Corbett reached deadlock after deliberating three days. The reason for the impasse was unknown because the jury foreman's note to the judge was sealed....