The murders all happened in January and February in one Iraqi province, Maysan, which borders Iran and where drug trafficking, tribal disputes and political score-settling have combined in a toxic mix reflecting the country's broader political divisions and struggle against corruption.
War-scarred Iraq is trying to recover from years of violence after the 2003 US-led invasion which toppled dictator Saddam Hussein. Normality often hangs by a thread.
But in Maysan, violence is a near-daily occurrence with police and judicial officials regular targets of assassination attempts.