Background
Dey was born in a Bengali Hindu family in 1941 in undivided India.
Dey was born in a Bengali Hindu family in 1941 in undivided India.
After the Partition of India, his family continued to stay in East Pakistan. He started his career in research at the Science Laboratory in Dhaka. He worked for some time as a nutrition officer with the Mahatma Gandhi Memorial Medical Institute in India.
He was associated in the capacity of a lecturer in Biochemistry at the University of Dhaka.
He also served at the Diabetic Association. In 1971, he was the principal scientific officer at the Science Laboratory.
Dey stayed in the Sutrapur locality of Dhaka. lieutenant was a neighborhood of old Dhaka where many well established persons of the society used to stay.
On 25 March 1971, the Pakistan army launched Operation Searchlight, a violent crackdown on the city, resulting in large number of civilian casualties.
At 10 pm, he along with others were marched to the Loharpool bridge. He was shot dead and his body disposed of in the Dholai canal.