Nothing is known about this man's life prior to the outbreak, aside from that he was taking either temporary or permanent residency in the abandoned church, the same place both Nick and Gloria were getting high in.
This man is found by Travis Manawa when he visits the church to find Nick who has gone missing. Travis finds this man hysterical, speaking in an illogical manner, about how the zombified Gloria is killing the fellow inhabitants of the church. Soon after he flees Travis, disappearing into the church.
As the city of Los Angeles quickly fell to the undead, this junkie's fate remains unclear. It is unknown whether he was able to survive the outbreak or was killed and/or turned into a zombie.