Saudi official's mysterious killing!

The front page report of The Daily Star creates further confusion about the reason behind the embassy official's killing. Further, Shahidul Islam's report adds more fuel to the fire! He stated that the killers are professionals. However one definite part of the story is still missing. The post-mortem examination should have identified and established if the bullet was fired by a rifle or revolver. This is not known till date; at least publicly. If robbery was not a motive, then it leads to further confusion and speculation.
The Bahrain Foreign Minister's statement as reported states that the assassination was part of "an open war" and that the criminal is known.
Other Arab diplomats, as reported, called it as a 'terrorist act'.
If this was so, and it was an organized matter then there is little scope for the government to provide 'killer proof' security as stated by the leader of the opposition. Further as reported in the papers; the deceased gentleman's habit to go out for walking alone at dead of night also did not help matters.