Ismael Zambada (El Mayo)

The provided articles focus on the death of Nemesio Oseguera Cervantes, also known as "El Mencho," leader of the Jalisco New Generation Cartel (CJNG). The articles detail his death by Mexican armed forces and the subsequent wave of violence across Mexico. The articles also mention that other powerful cartel leaders continue to evade capture. However, none of the articles provide any information about Ismael Zambada, also known as "El Mayo." Therefore, it is impossible to provide a summary about him based on the given context.