back 13 individuals. reporter: steven keating was eventually sentenced to 110 years for his crimes. half of all the data collected by homeland security investigations is child pornography. and the most difficult cases end up here at this forensics lab in suburban washington. another image with this unusual stuffed animal led to 42 arrests worldwide after the european toy maker was found. once they were able to identify and make that association, they contacted the danish authorities and they went out with us right away. reporter: there is a huge emotional toll for investigators. but every successful case is a motivator. our satisfaction comes from the identification and rescue of those children. if we don t try to rescue those children, who s going to? a florida student learns no hug, no good hug goes unpunished. that s next on the grapevine. need to hire fast?
business a lot of people are saying, donald, you re the most amazing guy. reporter: donald trump, who emerged from saturday night live unscathed this weekend is attacking ben carson. carson is attacking the media. carson says it s time to move on from his personal history. he casts himself as a champion of religious concern conservatives and under attack from godless liberals. to the secular progressive movement in this country i m a very big threat. they can look at the polling data and they can see that i m the candidate who is most likely to be able to beat hillary clinton. reporter: in his book gifted hands carson described several violent incidents during his youth. reporters unable to confirm details have since questioned carson s honesty. today parade magazine reposted an interview with his mom corroborating atwith a padlock , stabbing somebody. but, you know, he said he has pathology kal disease. you believe him? if you have path logical disease,
back 13 individuals. reporter: steven keating was eventually sentenced to 110 years for his crimes. half of all the data collected by homeland security investigations is child pornography. and the most difficult cases end up here at this forensics lab in suburban washington. another image with this unusual stuffed animal led to 42 arrests worldwide after the european toy maker was found. once they were able to identify and make that association, they contacted the danish authorities and they went out with us right away. reporter: there is a huge emotional toll for investigators. but every successful case is a motivator. our satisfaction comes from the identification and rescue of those children. if we don t try to rescue those children, who s going to? a florida student learns no hug, no good hug goes unpunished. that s next on the grapevine.