PART THREE: THE CANDY MAKERS Use of lead-tainted ingredients in some candies made in Mexico raises ethical questions. By JENIFER B. McKIM and WILLIAM HEISEL/ The Orange County Register Photos by ANA VENEGAS/ The Orange County Register HANDS ON: A worker rolls Serpentinas candy at Dulces Moreliates in Morelia, Mexico. The Register found high levels of lead in the version meant for Mexico but sold in Orange County. Photos: ANA VENEGAS/ SUMMARY Situation: Some candy makers produce two versions of their products – a clean, costlier version for the U.S. market and cheaper, sometimes contaminated versions for the Mexican market....