Damn this is very sad news.  Dusty Hill, bassist for ZZ Top, died today at the age of 72.  No cause of death.  He wasn't touring with Billy and Frank due to a "hip issue" for which he was receiving medical treatment.  I guess something very bad went wrong or the "hip issue" was far more serious than he let on.

RIP Billy.  Now go and see the Tres Hombres in the sky.

https://www.rollingstone.com/music/music-news/zz-top-bassist-dusty-hill-...