Federal Investigation Agency Additional Director Wajid Zia began recording his statement in the Al Azizia reference against former prime minister Nawaz Sharif today.
Earlier, Nawaz reached the accountability court after arriving in Islamabad from Lahore on a private plane.
Zia, who headed the Panama case Joint Investigation Team (JIT) that probed the Sharif family's assets last year, has already testified in the Avenfield properties reference.
Zia informed the court about his appointment as the JIT's head and the Supreme Court's terms of reference with regards to the probe.
He said that the JIT work involved determining the ownership of the Sharif family's assets.
Later, Nawaz was allowed to leave the courtroom while the hearing went into recess.
Nawaz and his family are facing three corruption cases in the accountability court after NAB filed references against them in light of the Supreme Court's verdict in the Panama Papers case last year.
On Wednesday, hearing the Avenfield reference, Accountability Court-I Judge Mohammad Bashir had remarked that the decisions on all three references against the accused will be given together.
The testimonies of the prosecution witnesses in the Avenfield case was completed at the last hearing.
Moreover, on Thursday, the Supreme Court extended the deadline, for the second time, to conclude the corruption cases until June 9.
