Brown founded the Sarawak Report and Radio Free Sarawak in 2010 to first highlight local deforestation occurring in the Sarawak region of Malaysia. That led her to uncover a system of kickbacks between the logging companies and local officials. In 2013, her investigations turned from deforestation to exposing potential bribery and theft involved in a Malaysian public development fund, 1Malaysia Development Bhd (1MDB). She obtained leaked materials from an employee of PetroSaudi, an investor in the 1MDB fund, which showed that USD 700 million that should have been invested in 1MDB ended up in the personal account of the Prime Minister of Malaysia, Najib Razak.