Though police refused to confirm or deny the identity of the police officer in question, a spokesperson did confirm that an official was under disciplinary measures.
LETA named the officer as Gatis Gudermanis, a former chief of the police's specialist economic crime department which investigates major frauds, money laundering and the like.
In May, Gudermanis switched roles to become deputy of the main Criminal Investigation Bureau, making him one of the most senior police officers in the country.
In mid-June KNAB also detained police forensic bureau chief Ugis Araks as part of its investigations.
The details of the investigation remain under wraps but it is know that Gudermanis was previously under scrutiny in connection with an alleged cigarette smuggling racket, LETA reported.