patricide
The act of killing ones own parents usually the father.
The police suspect the kid of patricide because both his parents were murdered and there was no other suspects.
patricidal
ones commitment of patricide-killing ones parents
the young boy uriah was patricidal because he murdered his parents.
Re-Patricide
The act of killing one’s father only to have to kill him again once the outbreak takes effect.
Oh my God Dan! Did you just kill your dead dad? That’s Re-Patricide! Run!