 Four wealthy parents including the former chief executives of bond manager Pimco and specialty finance lender Hercules Capital Inc pleaded guilty on Monday to participating in a vast U.S. college admissions cheating and fraud scheme. Federal prosecutors in Boston say ex-Pimco CEO Douglas Hodge, Hercules Capital founder Manuel Henriquez and his wife, Elizabeth and onetime food manufacturer executive Michelle Janavs took part in a bribery scheme that helped their children gain admission to universities as fake athletic recruits. 