zimmerman was in class when the topic was discussed. neighborhood watch volunteer says he shot and killed the 17-year-old because he was beating him badly and feared for his life. carter talked how the law might be used in this case. the fact that there were injuries have a tendency to show or support that that person had a reasonable apprehension of fear. reporter: the prosecution tried to paint zimmerman as a wannabe cop who couldn t make the force. does the person indicate whether or not they have a reason for wanting to go on the ride-alongs? yes, sir. what is that reason? states here solidify my chances of a law enforcement career. reporter: a firearms analyst said the bullet hole in martin s hoodie indicates zimmerman s gun touched his clothes. the clothing displayed residues and physical effects consistent with a contact shot. reporter: john and tai, zimmerman claims trayvon martin grabbed his gun. but a dna expert testified he
this july 4th as if it were going to pass. did you get all that? the hemp flag, flying over the capitol. hemp could not be more american, thomas jefferson, george washington, grew hemp, used for clothes, shirts, all kinds of things. 90% of our hemp from canada. the hemp flag is flying this fourth of july. all right. good to know, john. yeah. makes me laugh. moving on to something called wi-vv, it is a a low power wi-fi signal that can be used to track humans behind walls. they use two different types of waves. you can tell the wave thingies. and they re able to detect people moving around. it has to have movement. the applications are fantastic. it can be used to search for survivors trapped in rubble from an earthquake, police entering a building. who is moving around inside. the person they re tracking doesn t have to be wearing