Houston police arrested one of their own Thursday on charges she tampered with evidence relating to narcotics.

Julissa Guzman Diaz, 37, was hired in January 2006 and assigned to the Clear Lake Patrol Division.

Houston Police did not provide details of the allegations, and formal charging documents were not immediately available in court records.

In November 2015, the Houston Police Officers Union named Diaz Patrol Officer of the Month. The honor was for detaining two suspected drug dealers after a traffic stop turned into a police chase and four kilos of cocaine were recovered at the scene.

Houston Police Chief Art Acevedo released the following statement on her arrest:

"Ms. Diaz's betrayal of the public trust and oath of office is inconsistent with the dedication of the men and women of the Houston Police Department (HPD) and their tireless, honorable service. While we cannot overstate our depth of disappointment, we take solace in the fact the investigation that led to Ms. Diaz's arrest was conducted by men and women of the HPD, the same organization and co-workers she betrayed. We look forward to working with the Harris County District Attorney's office to ensure she is held to the highest level of accountability under the law. Ms. Diaz's peace officer powers have been suspended and she has been placed on administrative leave pending the completion of an internal affairs investigation. I urge anyone with information regarding her criminal misconduct or misconduct by any member of the Houston Police Department to contact us."