Conversation so far:
When did Spencer leave Panic! at the Disco?
Spencer left Panic! at the Disco on August 2, 2015.
Why did Spencer leave Panic! at the Disco?
Spencer wrote an open letter to fans regarding his abuse of alcohol and prescription. Although Smith joined the band at first, but left the tour to continue fighting addiction.“

Question: what did he after he left
Self-contained rewrite: What did Spencer do after he left Panic! at the Disco?