THE arrest of former Supreme Court secretary Nurhadi Abdurrachman is clearly a success for Corruption Eradication Commission (KPK) investigators that is worthy of appreciation. But the detention of Nurhadi will not immediately ease concerns about the state of the KPK, which is now led by people chosen by President Joko Widodo.

The team of investigators under the leadership of Novel Baswedan detained Nurhadi and his son-in-law, Rezky Herbiyo