The following shall be sufficient causes for the disinheritance of parents or ascendants, whether legitimate or illegitimate:
(1) When the parents have abandoned their children or induced their daughters to live a corrupt or immoral life, or attempted against their virtue;
(2) When the parent or ascendant has been convicted of an attempt against the life of the testator, his or her spouse, descendants, or ascendants;
(3) When the parent or ascendant has accused the testator of a crime for which the law prescribes imprisonment for six years or more, if the accusation has been found to be false;
(4) When the parent or ascendant has been convicted of adultery or concubinage with the spouse of the testator;
(5) When the parent or ascendant by fraud, violence, intimidation, or undue influence causes the testator to make a will or to change one already made;
(6) The loss of parental authority for causes specified in this Code;
(7) The refusal to support the children or descendants without justifiable cause;
(8) An attempt by one of the parents against the life of the other, unless there has been a reconciliation between them. (756, 854, 674a)