The 42-year old Sacramento-based musician had been in a coma-like semi conscious state since a 2008 car accident left him badly injured. Not wearing his sat belt, Cheng was ejected from the vehicle during a high-speed head-on collision.

Cheng's story was told in a 2011 documentary created by POD members and The Whosoevers in an effort to raise money and awareness.

According to a statement posted to oneloveforchi.com, Cheng's mother (Mom J) said his heart had stopped. Mom J shared the family's sentiments. "This is the hardest thing to write to you, she began. "Your love and heart and devotion to Chi was unconditional and amazing. I know that you will always remember him as a giant of a man on stage with a heart for every one of you."