but in a statement said we have extensive measures in place, including preemployment and ongoing criminal background checks. and computer monitoring and firewalls. the numbers reported by cnn represent 1/100 of 1% of the 300,000 people we have employed during this time period. we continue to work closely with law enforcement and organizations like the national center for missing and exploited children as we constantly strengthen our efforts. what does the co-founder for the center of missing and exploited children say about sexual predators being hired at businesses that cater to children? >> this is a real threat. >> reporter: ernie allen is the president of the international center. he says for every sexual predator that gets caught, there are still thousands of them we don't know about out there trolling for children. >> most of those who have criminal records are the dumb