[2][3] Evidence provided by the secret witness dubbed Garson was used in trials against 4000 Turkish police officers accused of being members of the Gülen movement.
[5] Eren Erdem of the Republican People's Party (CHP) was prosecuted for revealing the identity of a secret witness but found not guilty of the crime and his release was ordered in January 2019.
[6] However, the prosecution issued a new arrest warrant the day after the verdict alleging a flight risk[7] and Erdem was sentenced to over 4 years imprisonment due to a testimony of a secret witness on 1 March 2019.
[8] The American pastor Andrew Brunson was prosecuted also on grounds of testimony of a secret witness accusing him of supporting the creation of a Kurdish Christian state.
[16] Nevertheless, the use of secret witnesses is allowed according to British law,[17] but if their use in trial is granted by a court, the prosecution is obliged to provide as much information as possible to the defense.