Boulder police have arrested a man they say made inappropriate comments to three girls and threatened one of their parents at a city park on Sept. 2.

Police announced in a release that Warren Dennis, 54, was arrested on Saturday afternoon as he attempted enter the East Boulder Recreation Center, 5660 Sioux Drive. He faces two counts of harassment.

Dennis is a registered sex offender, according to the news release, but he does not appear on an online public registry of sex offenders living within Boulder city limits or on a Colorado Bureau of Investigation registry. Police say Dennis has an out of state misdemeanor sex offense conviction.

Police allege Dennis approached the girls — ages 9, 10 and 12 — at Park East Park, 811 Mohawk Drive, and made inappropriate comments about their bodies.

The girls told a parent who returned to the park to confront the man police have identified as Dennis. Police say Dennis became aggressive and threatened sexual violence against the parent, adding that he would also burn down the neighborhood.

He has a prior conviction for failure to register as a sex offender, possession of marijuana, criminal mischief, false reporting, being a fugitive and theft, according to online court records.


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Survivors of sexual trauma or assault may call the Moving to End Sexual Assault 24-hour hotline at 303-443-7300 for assistance. More information on sexual assault and more information is available at movingtoendsexualassault.org.

John Bear: 303-473-1355, bearj@dailycamera.com or twitter.com/johnbearwithme