The following shall be sufficient causes for the disinheritance of children and descendants, legitimate as well as illegitimate:
(1) When a child or descendant has been found guilty of an attempt against the life of the testator, his or her spouse, descendants, or ascendants;
(2) When a child or descendant has accused the testator of a crime for which the law prescribes imprisonment for six years or more, if the accusation has been found groundless;
(3) When a child or descendant has been convicted of adultery or concubinage with the spouse of the testator;
(4) When a child or descendant by fraud, violence, intimidation, or undue influence causes the testator to make a will or to change one already made;
(5) A refusal without justifiable cause to support the parent or ascendant who disinherits such child or descendant;
(6) Maltreatment of the testator by word or deed, by the child or descendant;
(7) When a child or descendant leads a dishonorable or disgraceful life;
(8) Conviction of a crime which carries with it the penalty of civil interdiction. (756, 853, 674a)