Preliminary DNA tests say the victim could be human , he says . Tests also find ` ` unusually large concentration of chloroform '' in trunk . The hair is `` microscopically similar '' to one recovered from Caylee 's hair brush , the report said , but `` a more meaningful conclusion can not be reached as this is not a suitable known hair sample . '' Casey Brown is charged with first - degree murder in daughter 's disappearance . Lawyer 's spokesman says evidence does n't link Casey to any wrongdoing .
Preliminary DNA tests say the victim could be human , he says . Tests also find ` ` unusually large concentration of chloroform '' in trunk . Casey Brown is charged with first - degree murder in daughter 's disappearance . Lawyer 's spokesman says evidence does n't link Casey to any wrongdoing .