“The only non-demonic explanation I can think of would link it to the sudden cessation of using anti-depressants (SSRIs). That, or somehow the general stress of life suddenly far exceeded the ability of the anti-depressants to handle it, to the same effect. But if that’s the case, look for many other people to start snapping in similiar ways, to similiar extremes. “
You are assuming that she was on them in the first place. Maybe she or her family did not know she had a problem. Maybe they just now found out. Maybe she has a mental illness that just boiled to the surface. That is what it sounds like.
I agree. It sounds like she snapped.