similarities found in hairbrush belonging to casey anthony. >> gregg: welcome to a brand-new hour. in today's testimony. defense claims that caylee accidentally drowned in the grandparents pool. now following all the dramatic development. >> julie: a lot of evidence was presented today. it started at 9:00 in the morning and ended about 1:00 p.m. jurors got a forensic science lesson. the state's first witness was f.b.i. forensic examiner low who testified about hairs found in the trunk of the car. they maintain the hair belongs to little caylee. the f.b.i. examiner she confirmed that it belongs to anthony family member whether it