Convicted bombmaker escaped U.S. prison without his absence being noted for 4 days

(CTV) LAS VEGAS - U.S. authorities say they are investigating how a convicted bombmaker was able to easily escape from a Nevada prison without anyone noticing for four days, before a tip led to his capture at a transit centre in Las Vegas Wednesday night as he prepared to board a bus out of town. State corrections officials didn't realize until Tuesday that Porfirio Duarte-Herrera had escaped Sept. 23 from the medium-security prison where he was serving a life sentence for a deadly 2007 explosion outside a Las Vegas Strip resort.-- More...