[7] In May 2009, Roy was the superintendent of police in Chandpur District[8] when 30 homes were burned down in an arson attack over char land.

[13] Roy led raids to arrest foreigners illegally staying in Bangladesh in November and detained 31 people from different African nations.

[14] On 3 December 2014, Roy, then deputy commissioner of the Detective Branch (South) arrested three Rohingya linked with Jama'atul Mujahideen Bangladesh and the 2014 Burdwan blast in India.

[19] His team investigated the son of the owner of Apan Jewellers for rape at the Raintree Hotel in Dhaka.

[26][27] He praised the Bangladesh Police and the government for increasing the posts for senior officers which he said would help reduce crime in Dhaka.

[28] He told the media that criminals were using face mask requirement during the COVID-19 pandemic in Bangladesh to hide their identity.

[31][32] Roy was sent to forced retirement after the fall of the Sheikh Hasina led Awami League government in August 2024.