Mockery

noun

1. The action of mocking; ridicule, derision.
2. Something so lacking in necessary qualities as to inspire ridicule; a laughing-stock.
3. Something insultingly imitative; an offensively futile action, gesture etc.
4. Mimicry, imitation, now usually in a derogatory sense; a travesty, a ridiculous simulacrum.

   "The defendant wasn't allowed to speak at his own trial - it was a mockery of justice."