ANKARA, Turkey (AP) — Turkish Prime Minister Recep Tayyip Erdogan on Friday hit back at critics who have alleged that he has been stalling a corruption investigation reaching his family, while a lawyer says the leader’s son was ready to give testimony to prosecutors.

Erdogan last month dismissed four government ministers implicated in a vast corruption and bribery scandal surrounding alleged illicit money transfers to Iran and bribery for construction projects. He then quickly moved to replace police officials involved in the investigation, an action which news reports said thwarted a second corruption probe that sought to question his son, Bilal Erdogan, among others. Police allegedly refused to bring Erdogan’s son for questioning on prosecutors’ orders.