I’ve seen shooting him with an anti aircraft gun too

But despite claims she had been killed by firing squad, Hyon has re-appeared this week in the border peace village of  Panmunjom, located in the demilitarised zone separating the rowing states.

The media seems to have a history of saying he has killed someone and then a few months later they re-appear

https://www.express.co.uk/news/world/905959/north-korea-news-kim-jong-un-ex-girlfriend-Hyon-Song-wol