Theo Bronkhurst, the Zimbabwean guide who led the hunt in which Cecil the lion was killed, has appeared in court in Hwange town, about 435 miles south of Harare.
He has been charged with failing to prevent an illegal hunt, charges he denies.
John Ray, ITV News's Africa correspondent, reports:
American philanthropists have pledged to match new donations up to $100,000 to the research team who had been tracking Cecil since 2008.
Dozens of protesters gathered outside the practice of a suburban Minneapolis dentist who killed a protected lion in Zimbabwe.
A host of celebrities have taken to social media to speak out on the killing of well-known lion Cecil in Zimbabwe by a US dentist.