Roy taking charge of Mumbai Crime Branch, as its newly appointed chief, in 2010. Pic/Getty Images

Widely known among his colleagues as the 'hulk' with a 'strong voice' to match, the 1963-born Himanshu Roy was considered one of the most upright police officers, having vast knowledge of the crime scenario in the city. Posted as an additional director general of police (establishment), he served Mumbai and Maharashtra in various important posts.