one worker is john chan chao who is in jail. the school claims it didn't know until after his arrest that almost none of the school employees had within fingerprinted or had a background check. the school says it's since collected background checks on all of its students. >>> yogi barra died last night. known as much for his famous phrases as for his record setting world championships with the yankees. but as curt gregory reports, some of the yogiisms are going to live on forever. >> lawrence peter barra was born in 1925 in st. louis. a childhood friend gave him the nickname yogi. yogi dropped out of school in the eighth grade to help support his family and signed with the new york yankees in 1942 for $500. during world war ii he joined the u.s. navy, took part in the d-day invasion and served in the european theater before returning home. barra was a catcher with clout. he led the yankees in rbi for seven straight seasons and hit at least 20 home runs in ten strait seasons. a three-time mvp, his yankee teams won 14 pennants and