10 mile radius would also take into account parts of Holden, Rutland, and likely Sterling as well. Even 5 miles from the crime scene could put that offender in technically a different town. Also sex offenders have to register for a variety of offenses and most registered sex offenders do not pose a serious public risk. But they should all be checked none the less.
Two other areas I think the police should at least look into, are one I think they should see if there was any connection btw the 28yr old Rutland (a neighboring town to Princeton) man who died on the mass pike Monday nigh going the wrong way..
..and two I think they should also rule out the possibility that Vanessa knew the dentist accused of pushing his wife out of a 3rd story window in Dec 2011. The dentist and his wife lived basically around the corner from where Vanessa vanished. A few night before the wife's death they held a Xmas party were many town residents attended. As far as I know the husband is still due to stand trial....so I hope the police rule out any possibility that perhaps Vanessa knew something about that.