The double murder case hearing against Davis is going on in Kot Lakhpat Jail, Lahore.
Davis, a CIA contractor, is allegedly involved in the killing of two Pakistani men in a busy Lahore street on January 27.
However, the US national claims he acted in self-defence.
Meanwhile, the US authorities have pressed for his release on grounds of diplomatic immunity, in a case that has fractured fragile diplomatic ties between Pakistan and the US.