Familicide

Because of the familicide that wiped out his entire family, he will be charged with six counts of murder.

Familicide is the murder of family members by another family member. In other words, familicide is a multiple-victim homicide in which the killer's spouse or partner and one or more children are killed. Although familicide is relatively rare, it is nevertheless the most common form of mass killing.

The popular professional wrestler became the most notorious familicide of 2007.

There has also been some recent work focused on diagnostic correlates in aggressive individuals, including a familicide.

While hiding there under the assumed name Calinda, she nearly falls prey to duke Brianto, a stock character modeled on the salacious predatory Turk (a ‘familicide’ of “beastly appetite,” in league with a dishonest Greek ally) […]

His behaviour in Ukraine increasingly resembles that of a familicide, who would rather kill his wife and children than let them go.