Sex Offender Registration Unit



On July 1, 2002, the Colorado Bureau of Investigation (CBI) was deemed responsible for the management and operation of the Colorado Sex Offender Registry (SOR) and the associated public website.  The Colorado SOR is maintained on the Colorado Crime Information Center (CCIC) computer system for Colorado law enforcement agencies, and on the Internet for the public.  The CCIC system works in conjunction with the National Crime Information Center (NCIC) system, exchanging registration information throughout the United States.  This information is also shared with the National Sex Offender Registry (NSOR) public website.      

In accordance with state law, not all registered sex offenders in Colorado are posted on the Colorado Sex Offender Registry website.  The website does not list sex offenders convicted of misdemeanor sex offenses or those sex offenders who received juvenile adjudications.  The website contains these four categories of convicted sex offenders:

  • Sexually Violent Predators (SVP's), including those found to be an SVP under the laws of another state
  • Adult offenders convicted of multiple sexual and/or violent felony offenses (multiple offenders)
  • Adult offenders who have failed to register as required for a felony sex offense
  • Adult offenders convicted of a felony sex offense and registered with local law enforcement, as required

For a complete list of all registered sex offenders in Colorado, or for a specified local area, a citizen can fill out a request form located on the SOR website and mail it to the CBI office, along with the required fee.  We do not accept this form by fax or email.  There is also a Visa/Master Card form located on this site.    

The CBI may inform those requesting a criminal history check on a specific person that the subject of their inquiry is also on the sex offender registry.  On a criminal history report, if the person is a registered sex offender, the term "Registered Sex Offender" will appear.  The "Registered Sex Offender" notation will display after the demographic information but before the arrest/disposition history if the person is currently registered as a sex offender in the State of Colorado with a local law enforcement agency.      

For sex offenders who are moving to another state, the CBI is responsible for notifying the agency that is responsible for registration in the new state of the move.  Information provided to the state will include the new address where the sex offender plans to reside, the planned date of relocation, and the literal conviction requiring sex offender registration.  

The CBI must also provide standardized registration forms used for registering sex offenders to the local law enforcement agencies and is the custodian of all forms and other documents associated with sex offender registration.  

The CBI processes orders discontinuing a sex offender's registration requirement issued from a Colorado court.  The onus is on the offender to provide the CBI and the local registration agency with a copy of the court order discontinuing the registration requirement for processing.  Orders may be provided to the CBI via email, mail, or fax.  To begin the de-registration process, self-help forms may be found on the Colorado Judicial Branch website. 

To ensure that sex offenders who fail to respond to address verification attempts or who abscond from registration requirements are located quickly, the CBI will share information with local law enforcement agencies.  The CBI uses analytical resources to assist local law enforcement agencies in determining the potential whereabouts of non-compliant sex offenders.  The CBI reviews and analyzes all available information and provides the information to local law enforcement agencies in order to assist in locating and apprehending those sex offenders who are non-compliant with registration requirements or have failed to register.  


For questions regarding failure to register sex offenders or the sex offender registration process, email the CBI Sex Offender Registration Unit at


Agent in Charge
Christian Mohr

Sex Offender Registration Unit

690 Kipling Street, Suite 4000

Denver, CO  80215

Phone:  (303) 239-4222

Fax:  (303) 239-5788


Kristie Mahler
Phone:  (303) 239-4222

     CBI TIP LINE     

(303) 239-5732

Please call to report the possible location of an offender who is in violation of his sex offender registration requirements or has failed to register, or call your local law enforcement agency.