By TOM COPE(News Tribune Associate Editor)MIAMI - A young Texas life-texnwsr faced a fierce grilling ioday in cross examination by Ihc Stale, a cross examination begun late yesterday, after the witness had dealt the prosecution the last of several hard blows in the Mossier murder trial. copeVirgil N. Halford, 29-year-old convicted rapist duing time al the Ellis Prison Farm 70 miles north of Houston, was witness No. 21 for the defense, which expects !o complete its case some time tomorrow afternoon —with prospects that the fate of Mrs. Candace Mossier and her nephew Melvin Lane Powers will go to the jury Wednesday.Before that happens, Rich* a ret E. Gerstiin, state's attorney, wilt ask that Cindy Moj. sler and her alleged incestuous leva' Mel be executed in the electric chair at R»ifordfor the June 30, 1964 murder of her millionaire huibano, Jacque Mossier, 69, In e rented apartment on Key Bis-cayne..Halford, a dark, lean, almost ascelie looking young man, testified in a gentle, low, respectful voice to explain the behavior of his best prison buddy, Billy Frank 3!uIvey, also known ns Sonny. He said that Sonny, who has been regarded ns the •State’s most damaging witness, made a deal with Florida and Texas authorities to lie about Candy and MelDid I know Mulvcy! the respectful rapist replied to a question by defender ClydeWoody. Heh—iu penitentiary affairs we was aces-wo aced around all the time-Mulvey it the complMt »!rv ner who, by his own sworn statement, fs beyond all ping* of conscience—-Thlr* that's bad? You ain't heard any. thing yet . . He has testified that Candy paid him 57,-000 down on a $15,000 contract to destroy Mr. Mossier and he has testified that Mel confessed the murde- to him In(Turn To TRIAL. Pg. 3)iy