No one shoved him, hit him on the head, etc etc.
My friend's father fell out of bed in a facility. It happened. They added bars to his bed. Physically he was in good shape...but Alzheimer's took his mind and spirit.
Well, that's settled then. Did you call the Philadelphia police homicide unit, Philadelphia district attorney, Attorney General, and Health department?
They would appreciate the results of your investigation so they can call off theirs.
Manpower, and all. Budgets and whatnot.
Good work, detective.