Nothing is known about Billy's life prior to or as the outbreak began.
After the Reapers destroyed his home village, Billy and several of his fellow survivors fled far enough until the point they had successfully escaped the Reapers. He and the majority of the survivors were staying at a rendezvous while Maggie, Cole, and Elijah went out to ensure Hilltop was safe despite the recent Whisperer threat. At some point, the rendezvous was attacked and Billy and Jen were killed while the rest of the group fled. Their charred corpses were found by Cole and Kelly at the ruins of the rendezvous building.
- Killed By
When Montanio set the building Maggie's group was hiding in on fire, Billy was unable to escape and perished in the flames.
This list shows the victims Billy has killed:
- Possibly numerous counts of zombies
- "Home Sweet Home" (Corpse)