Assistant Superintendent Khalequzzaman, leader of the four-man team from the Criminal Investigation Department (CID), is likely to submit the charge-sheet in two weeks, sources privy to the investigation into the gruesome killing said.

They, however, declined to disclose whether charges would be pressed against alleged mastermind Nurul Islam Sarker, a Jubo Dal leader in Tongi.

"The CID has already finished field investigation and will wind up the probe within 10 more days," said a top CID officer.

Some 20 gunmen opened fire on a rally of Awami League's volunteer wing Shechchhasebak League at Noagaon near the legislator's house in Tongi, killing the AL lawmaker and executive president of Sramik League and schoolboy Omar Faruq Ratan, and injuring at least five others on May 7.

Ahsanullah's brother Motiur Rahman charged 17 persons with Nurul Islam as the mastermind, but police could arrest only three -- Mahbub, Monir and Dulal.

Of them, Mahbub confessed to have fired on the rally, confirming that Nurul Islam Sarker plotted the killing.

The other accused on the run are Nurul Islam Dipu and his two brothers-- Shahidul Islam Shipu and Ohidul Islam Tipu, and Kana Hafiz, Ratan Mia, Anowar Hossain Anu, Sohel, Shohagh, Jahangir, Al Amin, Faisal, Rony, Bulu Mia and Syed Ahmed Majnu.

Police also arrested Kabir Hossain, a North Badda landlord who sheltered the three accused, and four suspects -- Nasiruddin, Suman, Oli Mian and Qaiyum.

On the absconders, a CID officer said they were trying their best to nab them. "We will press charge against all who are found involved in the killing. We'll not wait for their arrest and the court may try them in absentia," he said.