I received this information from our entomologist.
It's a mite!I have no idea what kind. Sorry to not have more specific information.
There are a few possibilities. 1. Bird mites: possible if there has been a history of birds nesting in attic or eaves OR if birds are kept as pets in the home. 2. Scavenger mites: a broad term for a variety of mites, not uncommon in homes. 3. Grain or mold mites: usually found in places with high humidity or moisture issues, more common in bathrooms and kitchen/pantry areas, but could be in bedrooms under the right circumstances. 4. Other predatory mites: usually feeding on insects or other arthropods or rodents, not usually a problem for humans.
Most indoor mites are a nuisance more than a pest problem, but it all depends on the circumstances and getting a complete identification.