Brig Athlenda Mathe

Brig Athlenda Mathe is not mentioned in any of the provided news articles. Therefore, it's impossible to provide a summary about her based on the given information. The articles discuss a whistleblower murder case, allegations surrounding the death of Zambia's ex-President Lungu, and the death of a man named in a South African police corruption probe. These events are unrelated to any individual named Brig Athlenda Mathe, according to the text provided.