The trial of a professional hunter who helped an American kill a popular lion named Cecil in an allegedly illegal hunt in Zimbabwe has been postponed to Sept. 28.

Theo Bronkhorst appeared Wednesday in a court in Hwange town, where he faces charges of failing to prevent an unlawful hunt. If convicted, he faces up to 15 years in prison.

Givemore Muvhiringi, Bronkhorst's lawyer, asked for the trial postponement so he can prepare the case. The prosecution did not object and Magistrate Lindiwe Maphosa approved the postponement.

Bronkhorst assisted Walter James Palmer, a Minnesota dentist who killed Cecil in early July. Zimbabwean officials say the killing of the lion was not approved and a Cabinet minister says Palmer should be extradited.