That's what I thought until I read that the old man was so infirm that he wasn't even able to open the car door (or roll down the window). Apparently his wife (who was in the car also) was also unable to do anything to save her husband.

Don't get me wrong - I feel for the son. He evidently was doing his best to support his parents but why couldn't he just leave them in a library or a shopping mall, or something like that?