A Parker police sergeant resigned last week while under investigation for sexual harassment and other policy violations, including one related to a youth engagement program, according to a letter from the Douglas County district attorney’s office.
Parker Police Department officials on Thursday announced Sgt. Troy Brienzo had resigned Feb. 13 while under investigation for an “alleged incident” that agency leaders learned about on Jan. 7. The department would not provide any other information about what Brienzo is accused of doing or which outside agency is investigating him.
But a partial screenshot of an undated letter from the 23rd Judicial District Attorney’s Office shared on multiple social media sites states Brienzo was placed on administrative leave for allegedly violating town and police department policies related to sexual harassment, the Police Explorer program, prohibited activity, disciplinary action, standards of conduct and supervisory roles.
The Denver Post has confirmed the letter’s authenticity. The 23rd Judicial District Attorney’s Office was required to send the so-called Rule 16 letter, or Brady letter, because Colorado laws require prosecutors to disclose information about officers to defense attorneys when it could affect a criminal case.
Brienzo was an advisor for the Police Explorer program, according to a 2024 social media post by the Parker Police Department.
The program works with teenagers and young adults between 14 and 20 years old to help them “gain insight into law enforcement programs that offer hands-on career activities,” agency officials wrote on the program’s page.
Brienzo also participated in the program when he was younger, the department said in a 2016 Facebook post.
The district attorney’s office declined to comment on the case, and Parker police spokesperson Josh Hans said the department was “unable to share any additional information at this time” in response to questions about the allegations and the agency conducting the investigation.
Parker Police Chief Jim Tsurapas said in a statement the allegations run “counter to this department’s mission and values and tarnish the very badge we wear.”
Tsurapas added the case is being taken seriously and is under active investigation.
“It will continue through the appropriate processes to ensure transparency, accountability and to maintain the community’s trust,” he said.
Officials from the Douglas County Sheriff’s Office and the Lone Tree, Castle Rock and Aurora police departments said their agencies are not involved in the investigation.
Brienzo was featured frequently on the department’s social media, including when the CCV Rotary Club of Parker named Brienzo the officer of the year in 2025. In a Facebook post about the award, the Parker Police Department wrote that Brienzo is “a force of positivity, resilience and unwavering dedication.”
Brienzo is still certified as a police officer on Colorado’s Peace Officer Standards and Training database, though his profile notes he is not employed and resigned while under investigation.
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