Picton came to public attention initially for his alleged cruelty during his governorship (1797–1803) of Trinidad, as a result of which he was put on trial in England for approving the illegal torture of a 14-year-old girl, Luisa Calderón. Though initially convicted, Picton later had the conviction overturned arguing that Trinidad was subject to Spanish law, which permitted the use of torture. Controversy over the torture and Picton's role in the colonial slave trade continued. In 2020, Cardiff council voted to remove Picton's statue in the "Heroes of Wales" gallery in Cardiff City Hall.