Jo Yeates murder suspect

Has anyone else noticed that the police have been especially hyper-vigilant in this investigation and the more so as time went by? I have the impression that whoever is in charge is super-concerned about his own reputation. Yes, in a one sense this is good, but we are all human and even policemen can go over the top. So my mind is open as to whether they have charged the right person or if he is indeed, a scapegoat. Also, the horoscope for 10th February 1978 in Amsterdam looks particularly innocent - all day.