(around 7 min) The crew goes to the back door to look at how the house was broken into. The electric meter box, without any electric meter in it, is clearly visible in the frame.
At about the 25:54 mark when Grissom is looking at the pictures on the wall a man passes by the window, then about 5 seconds later, the same man, going in the same direction, passes by again.
Catherine tells a colleague that they knew the girl was a virgin because of her intact hymen. However, if her hymen had been intact, that would instantly make it obvious that she had never given birth, and couldn't be the biological mother of the baby. But it is mentioned that she gave birth by Cesarean section, which would not affect the hymen.