There are mutliple artists with this name:
1. Demented is a brutal death metal band from Spain. 2. Demented was a local death metal band from UK. 3. Demented is a thrash metal band from Sweden 4. Demented was a crossover thrash metal band from Indiana, USA. 5. Demented was a crossover thrash metal band from USA. 6. Demented was a Thrash Death band from Germany. 7. Demented was a local sub-underground s**t/noise/black metal (early) undrummed death metal (later) band from Buzau/Romania that started on June 5th..