Crime Lab Tech News Today

End of the gun was against the material when it was fired? >> yes. >> reporter: most of the afternoon dealt with dna analysis and the florida crime lab tech said under all of trayvon martins fingernails, no dna material belongs to george zimmerman was found. and so zimmermans handgun, all of the dna discovered belonged to george zimmerman, none of to trayvon martin. that challenges george zimmerman s claim that trayvon martin grabbed his gun forcing him to shoot him. july 4th is a holiday. the j...