It makes sense to focus on the family first, especially for a claim of middle of the night intruder that didn't take anything besides cellphones ( which is dumb ).

I think the more there are cases like Susan Smith (who claimed a black man car jacked her car and drove off with the boys in it) or Casey Anthony, who let the cops spend months and lots of $$ searching for Caylee, the more they are likley, without good strong leads/evidence to try to "crack" the family.
Don't let your heart be broken. Let it love.