IMO, Howard cleaned out the frig before any photos were taken. I think after Daniel, he’d have been very careful about what he left in evidence. The photographic evidence could be misleading. Purposely.
Boy, he was sure lucky that he took the photos of Danny, Anna and baby a few hours before he died.
Of course, any NORMAL person would have waited till morning. Wonder who's a** he kissed to get the baby out of the nursery at that hour. Nurse Gibson?