This former member of Down was also a member of a group that started as what kind of band?
Rex Brown: Rex Robert Brown (born July 27, 1964) is an American musician and author, who is best known as having been the longtime bassist for the Grammy-nominated, platinum-selling, now defunct band Pantera (1982–2003). Rex Brown:  He is a former member of Down (2001–2011), and is currently the bassist for the band Kill Devil Hill. Pantera: Pantera was an American heavy metal band from Arlington, Texas. Pantera:  Having started as a glam metal band, Pantera released four albums during the 1980s.
a glam metal band