It’s certainly not a pleasant subject but important nonetheless. First of all let me say that statistically speaking you probably don’t live next to a sex offender, however that’s no reason not to exercise caution and check with the Colorado Bureau of Investigation (CBI) just to make certain. Also, if you are looking to hire someone to care for your children you would be remiss to not run an extensive background check on them.
The CBI website lets you search by name, address, zip code, and so on. It will also indicate whether a person is considered violent, a repeat offender or someone who has failed to register on other occasions.
There is also a national sex offender registry you can access here. Also, please note the word of caution that is included in this website: “Any person who uses information contained in or accessed through this Website to threaten, intimidate, or harass any individual, including registrants or family members, or who otherwise misuses this information, may be subject to criminal prosecution or civil liability under federal and/or state law.”

