Boulder, CU police identify individuals who left suspicious envelopes at Greek houses

Boulder police and the University of Colorado Boulder Police Department have identified individuals seen taping suspicious envelopes on several doors of Greek houses near the University of Colorado Boulder.

The departments do not believe there is any known threat to the people or organizations that received the envelopes, according to a news release.

The release states both departments will continue investigating to determine whether criminal charges are warranted.

The CU Police Department tweeted Monday night that residence hall evacuations at the Boulder campus were not related to these incidents, but instead were caused by frozen sprinkler pipes bursting. The burst pipes caused water to move through the sprinkler system, which activated the fire alarm and caused Boulder Fire-Rescue to respond.

In a separate news release, Boulder police spokeswoman Dionne Waugh stated the department was looking to identify the person seen on surveillance video taping the white envelopes to the doors to several fraternity and sorority houses about 1:30 a.m. Monday.

Waugh wrote that members of at least five houses reported receiving an envelope.

Each envelope contained a CD that was recorded with audio, some of which was from the television show Criminal Minds.

Police still want anyone with information about any of these incidents to call the Boulder Police Department at 303-441-3333 in reference to case 21-1367. Those who have information but wish to remain anonymous may contact the Northern Colorado Crime Stoppers at 1-800-222-TIPS (8477). Tips may also be submitted through the Crime Stoppers website at

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