jericho has been shot ask nd killed by poachers. they were notified by phone that jericho had been killed. but they say they have yet to see evidence that's true. in a statement they said, it is with huge disgust and sadness we have just been informed that jericho, cecil's brother, has been killed at 4:00 p.m. today. we are absolutely heartbroken. what's confusing, say researchers at another local wildlife location, is that jericho's collar remains active, sending a gps signal and movements suggest he's still alive. all of this unfolding as officials in zimbabwe push to extradite american walter palmer. >> i understand already the processes have started and we are looking forward for his extradition. >> reporter: palmer admitted to killing cecil, claiming he thought his guides obtained proper permits. no charges have been filed against doctor palmer. tonight while the investigation oversees ill's death continues,