When I was in Zim, my PH told me that it was legal to shoot and kill any poachers whom we thought were poaching elephant or rhino. I don't think any rhinos were around there but we did find an elephant, dead for about two weeks, with the front part of its face hacked off and gone. That evening 17 game scouts showed up to try to find some sign of the poachers.
I'm glad we didn't shoot any. I heard about one white Zimbabwean who shot one that turned out to be the son of a government minister.
