Update on search of father charged with killing his 3 daughters [ Does not protecting human sanity demand a more COMMUNAL social order ?]

Has psychiatry explored the minds of parents who kill their own children ? It seems so much like an abominable and detestable crime against nature ? ( or for that matter children who kill their own parents ) . I suspect it has some explanation in Sigmund Freud's book " Civilization and Its Discontents " . To be be sure , for several centuries now the capitalist social order has put severe strains on Marriage & Family. Read Engels on " The Origin of the Family , Private Property ,and the State " . Does not protecting human sanity demand a more COMMUNAL social order ?