A Chartered Accountant by training and an Indian Police Service (IPS) officer of the 1988 batch, Roy is survived by his wife Bhawna Roy, an IAS officer who quit civil services to work with NGOs in Maharashtra.
The Mumbai police, which has registered an accidental death report, said in a statement, "A suicide note has been found which states that he is ending his life as he is frustrated with the disease (cancer)".
One of Mumbai's leading cops, Himanshu Roy, committed suicide on Friday.
According to Dr. Nagarkar, Roy first developed cancer in his kidneys in 2000, "He underwent extensive chemotherapy and surgery and succeeded in removing those tumours from his kidneys".
Maharashtra's Specialist Specialist IPS Officer Himanshu Roy has committed suicide. This is really a matter of sorrow for Mumbai and our country also that we have lost a great Police Officer.More news: Tiger Woods produces dazzling round to charge up Players Championship leaderboard
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He often ran into Roy at the gym in the morning and chatted with him, the former minister said.
The deceased's family, while accepting the warm gesture shown by people on Roy's shock demise, also appealed the late police officer's supporters to respect their privacy. "He had also taken radiation therapy earlier", Dr. Nagarkar said, adding like all patients going through hard illnesses, Roy was taking counselling therapy.
The officer, known for his dedication and soft communication skills had seven years of service left. Roy had taken a lengthy medical leave from duty to receive treatment for bone marrow cancer. "Maybe he felt burdened and decided he could not take it anymore", special prosecutor Ujjwal Nikam said.
Roy investigated the IPL betting scam, the J Dey murder and the Shakti Mill rape. During his tenure, the agency arrested software engineer Anees Ansari, who allegedly planned to blow up the American School of Bombay at the Bandra Kurla Complex. He was equally good at solving cyber crimes and he had a key role to play in the setting up the cyber crime cell in the Mumbai police.