The biggest difference in the current case is that two men have been arrested and charged with the killing.
Russian officials announced tonight that they had arrested a retired military intelligence official in connection with the killing of an investigative journalist three years ago.
An army spokesman said more than a dozen people had been arrested in connection with the killing.
Police confirmed yesterday a man has been arrested in connection with the killing and a report was being prepared for the procurator-fiscal.
No one has been arrested in connection with the killing.
Two men have been arrested in connection with the killing of the homeless man.
Five men and four women were arrested the next day in connection with the killing.
In 2005, two local men were arrested in connection with the killing.
Al-Qaeda took responsibility for the attack and several dozen people were arrested in connection with the killing, including the head of his own security detail.
Iraqi authorities have arrested a number of individuals in connection with the killing.