It’s always sad when a family member you love dies, but in this case, I don’t see any evidence of or motivation for a conspiracy to kill this man. I was very happy when McMaster left the president’s employ, but I never wished harm or misfortune on him ever.
When a patient is this up and age, a fragile ambulator, a person who may have trouble sitting up in a chair unassisted, things do happen. Many facilities don’t allow for straps or physical restraints to secure a patient to a chair. Many that do have to keep applying for waiver’s of that person’s individual rights.
It’s possible that he either fell, and the staff found him on the floor, and placed him in his chair, without reporting it, or staff assisting him, dropped him, then didn’t report it and put him in his chair. Unscrupulous staff are not likely to report a mistake or accident. It would be “suspicious” because it’s suspected that either of the two scenarios could have taken place, especially since he was found sitting in his chair. I’ve worked as a nurse, in nursing homes. Some of the staff, nurses AND aides, had appallingly bad characters. (Naturally, there are many good ones, as well.)