The first issue of the newsletter was released by Chief Minister Manohar Parrikar as part of the Independence Day celebrations here.
He lauded the police for being transparent in accepting their flaws in the newsletter.
"The Goa Police is ashamed of a PSI (police sub-inspector) and four constables who were arrested by the Central Bureau of Investigation (CBI) for false implication of David Driham, an Israeli national in Anjuna, in a drug case," said the newsletter endorsed by Goa Director General of Police Kishen Kumar.
Israeli national Driham alias Dudu was arrested by the anti-narcotics cell of Goa Police in 2010 with a narcotics cocktail of ecstacy, cocaine, heroin, LSD and 'charas' (cannabis) worth Rs 3.81 lakh.
After the raid, the police described Dudu as a "big time" dealer.
However, a sting operation, conducted by Dudu's sister, showed that the same police officer, Sunil Gudler, who had arrested the Israeli national, giving drugs to foreigners.
The case was later referred to the CBI by the Goa government. The CBI then arrested Gudler and four other policemen.
The newsletter now says that incidents such as these undermine police's credibility.
"Such misdeeds of police officials affect the credibility of the force and undermines constant good work. Every Goa policemen will now take a pledge of maintaining high standards and integrity and professionalism," the newsletter says.
"Such transparency is good," Parrikar said referring to the newsletter.