. >> i would say kezia, you sniffed the sunflower am i right? >> yes.ysanthemum dna in crystal. did you smell the cri san chris chrysanthemum? >> yes i did. >> nowadays by probing that dna we with actually learn potential information about the person. once we collect some dna there's no limit to what we can learn. >> as thee crime-fighting techniques are further developed more criminals will be outsmarted . by science and by technology. what is your message to criminals? >> we are going to catch you. we are going to use science and science is getting better and better. so you might as well turn yourself in. >> needless to say we've come a long way from just drawing chalk around a body. it is disconcerting if i just brush up against something they can get my dna. there is a lot can you do. >> volunteering that information will make sure you are implicated in a crime. >> i'm curious how juries can adapt to that. kosta, you tac take a look at 3d printing. >> jewelry heart valves and tasty treats. >> great, we'll take a look at >> ♪ ♪ ♪ ♪ ♪ >> hey guys welc