sentenced to die for strangling his cellmate nine years ago while serving three life sentences for other crimes. he's what many legal experts consider a first, prison officials used a chemical. due to the shortage of another drug normally used in that lethal injection mix. homeland security secretary janet napolitano is expected in arizona tonight after u.s. border patrol agent was murdered just a few miles from our border with mexico. the victim, 40-year-old agent brian carrie. the feds say the former u.s. marine was in a remote area with three other agents when gunmen opened fire. happened tuesday night just north of the border of nogalas, arizona. popular spot for drug smugglers. four people are in custody. a man hunt is under way for a fifth. officers are on horseback and on helicopter searching the area. update from the west coast news hub this afternoon. when do we expect the homeland security secretary janet