In February that year, the CBI took over investigation and filed three charge sheets (on April 7, 2009, November 24, 2009 and January 7, 2010), which were later clubbed into one.
Around 3,000 documents were marked and 226 witnesses were examined.
Raju later retracted his confession statement and contended that all charges levelled by the CBI were false.
During the trial, the CBI alleged that the scam caused a loss of Rs 14,000 crore to Satyam shareholders, while the defence countered the charges saying the accused were not responsible for the fraud and all the documents filed by the central agency relating to the case were fabricated and not according to law.
At present, all the accused are out on bail, though the Enforcement Directorate has also filed a charge sheet against them under the Prevention of Money laundering Act.
Satyam Computer Services ltd had later merged with Tech Mahindra.