Maybe. Some parents, if one parent does harm the other will report it. But I have seen cases where one parent did something and the other helped to cover it up.
There is also the possibility that JI didn't know. He was at work and supposedly that was verified. If something happened while he was at work, he may not have been told.
I haven't heard that LE has cleared the husband. He may have been at work but that doesn't mean he wasn't involved in Lisa's disappearance which, for all we know, could have happened prior to his leaving for work.
JMO