Mike Williams, a corrections field supervisor in Wausau, says his office has been getting three to six calls a day from concerned residents. That's since our reports about www.mapsexoffenders.com.

He advises you to look deeper into that Web site which links up to the Department of Corrections.

There you can find out when the sex offender committed the crime, whether or not they're on supervision and other information that may help you determine how serious a threat they are.

"Offenders that generally commit sex crimes within their own family have a lower risk of re-offending than offenders that commit crimes against unknown folks," said Williams.

Not all convicted sex offenders pose the same risk of re-offending. The U.S. Department of Justice found pedophiles that molest boys and rapists of adult women are most likely to repeat their crimes.

One of the studies shows within three years of being released from prison, 5.3 percent of offenders were re-arrested for a new sex crime.

Another study showed that number as high as 14 percent within four years of release.