Eavesdropping is a crime when a person not visibly present during a conversation:
• Knowingly overhears or records the conversation without the consent of at least one party to the conversation;
• Intentionally overhears or records the conversation for the purpose of committing, aiding, or abetting the commission of a crime;
• Knowingly uses for any purpose, attempts to use, or discloses to another the contents of the conversation while knowing or having reason to know the information was obtained in violation of the eavesdropping law; or
• Knowingly aids, authorizes, agrees with, employs, permits, or intentionally conspires with any person to violate the eavesdropping law.
Eavesdropping is a Class 1 misdemeanor. (CO Rev. Stat. Sec. 18-9-304).