In the rest of the US this could invoke some very old law.
Typically posse comitatus (as opposed to the federal Posse Comitatus Act), amounts to a county Sheriff ordering the formation of a civilian posse for a local emergency or to face escaped prisoners, or when a crime is committed.
However, even before posse comitatus in Common Law there exists a doctrine of “Hue and Cry”, in which any citizen can muster other citizens for emergency purposes. The Louisiana equivalent may be called “Criez la Peez” or “Crie de Pais”.
This is speculative, because Louisiana law is very peculiar. However, I don’t think that even a bold prosecutor would hold this against the woman’s family. A jury certainly wouldn’t.
Ironic point about a jury: if the DA blows it and indicts one of the family members, that defendant better pray for an all white jury composed entirely of Republican CCW permit holders.
Indeed. When someone shouts “Stop, thief!” it is a hue & cry.