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Joel Twambale (Boulder County Sheriff’s Office)

A Castle Rock man has been arrested after he was accused of sexually assaulting a woman at a bar in downtown Boulder over the weekend.

Joel Twambale, 35, was arrested Sunday on suspicion of sexual assault, resisting arrest and obstructing an officer.

According to an affidavit, a woman told police that she went out dancing with some friends to Press Play, 1005 Pearl St., sometime after midnight on Sunday when she became separated from her friends on the dance floor.

The woman said a man she did not know, later identified by the woman as Twambale, came up and started dancing and “grinding” on her. The woman said she tried to move away, but Twambale held her in place.

The woman told police she was scared and did not say anything, and that Twambale then used his fingers to sexually assault her, according to the affidavit.

After about three minutes, the woman said Twambale stopped and she was able to go to the bathroom, where she told a witness what happened. The woman’s friends also came to the bathroom, and then informed security.

The woman was taken to the hospital for a sex assault examination.

Police said a witness told officers she saw Twambale dancing with the woman, while Twambale’s friend said he never saw Twambale inappropriately touch any of the girls he was dancing with that night.

Police tried to talk to Twambale outside the bar, but the affidavit states he became “non-compliant” and refused to give the officer his information or let the officer swab his hands.

A group of people started to surround the officer and Twambale, with one man recording the interaction and one woman trying to get in between the officer and Twambale while touching Twambale’s hands, which police worried would contaminate possible evidence.

After officers ordered and pushed the crowd back, Twambale attempted to leave the area. The officer and security from Press Play then forced him to the ground, where he was handcuffed and placed under arrest.

Twambale was not injured during the arrest, and he was taken to the Boulder County Jail. Police at the jail were able to swab Twambale’s hands, though he refused to give them a DNA sample without an attorney present.

Twambale was released on a $10,000 personal recognizance bond, and is set for a formal filing of charges on Wednesday.

He has no prior criminal history in Colorado aside from two traffic cases.

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