Article 919. 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)