CAIRO- A criminal court in Giza, south of Cairo, starts on Sunday the trial of a driver at a private construction company who went on the rampage and killed eight colleagues earlier this month. The driver, Mahmoud Taha Ahmed Sweillem, pulled over the bus of his company, the Arab Contractors, near October 6 City, and opened fire at his colleagues while driving them to work on July 6. Investigations blamed the murder on duelling over archaeological deals between Sweillem and his colleagues. The murder is one of the worst mass killings reported in this conservative country in recent years. Arab Contractors is one of the largest construction companies in Egypt.