This character engages in a parricide.
Parricide (Latin: parricida, killer of parents or another close relative) is defined as:
* the act of murdering one's father (patricide), mother (matricide) or other close relative, but usually not children (infanticide).
* the act of murdering a person (such as the ruler of one's country) who stands in a relationship resembling that of a father
* a person who commits such an act.