Sentence 4 In Youth SlayingKour young men, previously convicted of killing .1 high school student outside • rock concert, have been given life prison terms.Superior t'ourt Judge William H. Keene passed the sentences on Ricardo mis IK; James Cunning-1 , n pi Robbv Crear 21, and Judson D. Bacot 22.’The foursome was con-\ ictod last Nov. 3 of beat-• .nil Romping to death Robert Ballou 16. high rliool athlete and son of a l.o- Angeles attorney.Ballou was set upon after trying to prevent a gang of youths from stealing jackets as they left ihe Hollvwood Palladium rock concert, March 20. 1972.I ’o ( c had said that lak ing ackets is a gang cu-toin, a so-called sign of pow er.Judge Keene found all four defendants guilty of murder in tin* first de-mw.