Boulder Police arrested a registered sex offender in connection with the sexual assault of a 14-year-old Westminster girl.
Christopher Ehlebracht, 29, met the teen on the online app Whisper.
Whisper is used by people to anonymously "vent" issues or confess things.
On Oct. 13, Ehlebracht picked the girl up at her home and drove her to his home in Boulder, where he sexually assaulted her.
On Monday, Boulder Police found him and arrested him on a warrant alleging sexual assault on a child, enticement of a child and contributing to the delinquency of a minor.
Ehlebracht was booked into the Boulder County Jail.
Ehlebracht is currently a registered sex offender. He was convicted of attempted sex assault on a child in Westminster in 2011.