The Clark County coroner’s office confirmed Thursday that 33-year-old Thomas Christian Marth was pronounced dead of a gunshot wound to the head on Monday. He was found in the backyard, though it’s unclear whose.

A tweet from the band’s official Twitter account earlier this week announced Marth’s passing, saying the band’s prayers are with his family and that “there’s a light missing in Las Vegas tonight.”

Band spokeswoman Jen Appel says Marth was not a full member of the Las Vegas-based rock band, but played saxophone on their 2006 album Sam’s Town and their 2008 album Day & Age.

He also played on the band’s tour for “Day & Age.”