Almus Khatun of Maizbona village made the allegation at a press conference at the office of the Crime Reporters' Association in the capital against OC Ohidur Rahman for killing her son Belal Uddin.

The mother said Belal used to work as informer of the OC who forced him to do many illegal jobs like collecting tolls and bribes for him.

"As I forbade my son not to be involved in any illegal job he refrained from working for the police officer," Almus told the press.

The OC fearing that Belal might disclose his illegal activities went to his house on February 4, 2004 and threatened to kill him if he did not resume work for him within three days.

As Belal did not turn up, Ohidur filed three false cases against Belal and his wife on December 14, and sent his wife to jail after arresting her, said the mother.

The OC again raided her house on January 11, 05 along with his forces and hit Belal in the head when he was working in a vegetable field.

Ohidur also hit Almus in the mouth with a gun breaking two of her teeth and arrested her with her eight-year-old granddaughter Marina Begum.

Later the OC again beat Belal severely and took him to a sluice gate where he shot Belal dead in front of many people.

Almus filed a murder case with a Chakaria court almost a year after the killing but the OC ousted her along with her family after that, said the mother in tears.

When contacted over telephone, the OC denied the allegation and said Belal was an accused in robbery and murder cases for which he was jailed for five years.

"After he came out of the jail, he was regrouping his gang for robbery and police found his body lying near the sluice gate," he told The Daily Star, adding that his mother or wife did not file any case after the killing.

Police later filed a case and submitted the final report as the investigation officer did not find any clue to the killing, he added.