A quick Google search of online dictionaries tells us that the verb ”to assist“ simply means “to help” and that can take any number of forms in this situation, including “giving information that may be relevant to her leaving” or providing help to the family to cope emotionally with her disappearance. There are other ways for Michelle’s employer to assist/help this family going through a terrible time, as have been mentioned in previous posts. If she had disappeared locally, the school employees might have been involved in searching for her, but it’s unlikely they have traveled to NOLA to look for her.
“Assist” is not a word that is limited to “helping to find her” or “giving information that may be relevant to her leaving” as you are interpreting it. Although there may have been a school-related situation contributing to her taking off, she was not at work during September and didn’t disappear until Sept 22, so that seems unlikely IMO. Her husband has made it clear that she is dealing with mental health issues with a counselor and with medication (that she had stopped taking), so a mental health reason for her disappearance seems much more likely than an employment issue.
It seems that a number of us are grateful to learn that the school district is assisting the family, in whatever form that assistance takes.
JMO