Terrorists .... or ...??

A story as I heard form a neighbor of mine who knows the victim personally.

During the last week, an employee working in the Badosh Prison was assassinated with 6 other in their way to Mosul.
This man was working as an accountant in Badosh Prison about 20 km from Mosul, during his work he noticed that there is a money assigned to be spend on the prisoners for their food, drings, and clthes, which is about $12 for each prisoner a day.
But in reality, the money spend is not more than $2 for each prisoner a day.He wrote a memo to the authorities, they decided to open an invistigation to found the truth, he had 6 witnesses.
The man and the 6 witnesses were in their way to Mosul for some thing related to the investigation, they were in one car with a police car accompanied them as a guards. In the middle of the way an armed men with automatic guns shot fire against their car killing all the passengers. The police guard didn't stop, take no any action and have no casuality in the accident.