POMONA—A convicted sex offender was sentenced April 27 to life in prison without the possibility of parole for the murders of two 6-year-old Southland boys in the 1980s. The sentence for Kenneth Kasten Rasmuson, now 59, was handed down following a series of emotional statements from the families of Jeffrey Vargo and Miguel Antero. Jeffrey disappeared on July 2, 1981, after leaving his Anaheim Hills home to look at a fireworks stand. His body was found the next day by construction workers in Pomona. Miguel’s body was found in a wash in Agoura Hills on April 8, 1986, the same day he went missing from his Agoura Hills home. Rasmuson was arrested in Idaho in 2015 after a DNA hit connected him to Jeffrey’s killing, and he was subsequently linked to Miguel’s slaying. He pleaded no contest Feb. 22 to two counts of murder and admitted the special circumstance allegation …