The weapon found inside the car that had been smashed by a train at Malibagh level crossing on Friday afternoon turned out to be of Nur Hossain's, the prime accused of the Narayanganj seven murder incident in April.
The car had slipped under the closing gates of the level crossing and got hit by a train. A woman and a child got out of the vehicle unscathed but three men inside the car were injured.
However, the passengers went missing immediately and an Austrian-made pistol with 12 bullets, and eight more bullets were recovered from the wrecked car.
Police on Friday night found AR Rahman, one of the alleged occupants of the car, at the intensive care unit of Holy Family Medical College Hospital in the capital. Police believe that Rahman is Nur Hossain's associate.
He was transferred to Apollo Hospital when his condition deteriorated yesterday morning.
Rahman's family claimed he works at a Narayanganj shipyard.
Nur Hossain, who made a dash for the Indian border after the seven murder, is now in a Kolkata jail in a case filed for illegal entry to the country.
Officer-in-Charge Abdul Majid of Dhaka Railway Police Station said, "The Austrian-made pistol with 12 bullets was licensed to Nur Hossain."
Police could not find the weapon that was believed to be used for the other eight bullets.
Nur and his family had 11 licensed weapons. Nine had been seized by police after the murders on 27 April. The other two had remained missing ever since, according to Siddhirganj police of Narayanganj.
"There were lots of new clothes, including expensive saris, cosmetics and toiletries, and men's wear inside the car," said Sub-Inspector Arefin Imam of Dhaka Railway Police Station.
"Since Nur had told an Indian court that he would seek bail when his family members visited him in India, we believe that the passengers intended to go to India with the clothes and cosmetics as gifts," he said.
Police said they would be able to learn more from Nur's alleged associate Rahman once the latter's condition improved.
Dhaka railway police and Narayanganj police claimed that another reported passenger of the car, Nur-e-Alam Khan, is Nur Hossain's brother-in-law.
Alam had received treatment in another hospital in Panthapath on Friday and left before police reached there.
Police are yet to identify the three other occupants of the car.
Meanwhile, Shahidul Islam, father-in-law of one of the victims of the seven-murder Nazrul Islam, told The Daily Star that they would soon launch a movement demanding that Nur Hossain be brought back home to stand trial.
He alleged that the government was dillydallying over his repatriation, fearing Nur Hossain's confession would mention names of many political big shots.