BNP-Jamaat alliance government had a hand in the August 21 genocide in 2004, said prosecutor on Monday.
"The government and administration directly aided, conspired, planned and provided overall support for the crime, resulting in huge number of casualties," said chief prosecutor of the case Syed Rezaur Rahman while placing closing arguments for fourth day.
The chief prosecutor argued on the connection of different accused with the crime.
He pointed out that executed HuJI chief Mufti Hannan and his associate Bipul had confessed their involvement with the attack.
"...but still they were not shown arrested in this case at the primary stage," Rahman said.
"They tried to hide the real criminals and divert the case to a wrong way by implicating innocent like Joj Miah," he added.
The chief prosecutor argued the attack was aimed at Awami League President and incumbent Prime Minister Sheikh Hasina, says a report in state-owned BSS.
Syed Rezaur Rahman named the people, who were in administration at the time and were accused of collecting grenades for the attack, aiding criminals to flee the scene, helping one of the chief orchestrators of the attack Mawlana Tazuddin to escape the country using fake name, and placed arguments on their crimes.
"Then deputy commissioner (DC) of police's south zone Khan Sayeed Hasan didn't take appropriate security measures on the place of occurrence. DC (east) Obaidur Rahman Khan too played same role. He didn't bother to preserve the live grenades, which were used in the attack, after seizing those," the chief prosecutor said.
He also placed arguments on the crimes of former state-minister for Home Affairs Lutfuzzaman Babar, deputy minister Abdus Salam Pintu, Major General (retd) ATM Amin, Lt Colonel (sacked) Saiful Islam Joarder, Lt Commander (retd) Saiful Islam Duke, former IGP Khoda Boksh Chowdhury, former investigation officers Special Superintendant Ruhul Amin, Senior ASP Munshi Atikur Rahman and ASP Abdur Rashid.
A total of 225 prosecution witnesses testified in the case, while 20 witnesses were produced by the defence.