Well actually it sounds like the old man did it to himself...he should have known his own limitations.
Actually, he was trying to stop the situation...and asked his wife to call the police. Sounds like he did know his limitations, yet the son pressed the issue.
Her husband had the younger Zalaffi in a head lock and was telling him to calm down.
The younger Zalaffi got up off the floor and began yelling at his father, “Can’t keep up with me, you’re getting weak. You can’t keep up with me anymore,” the criminal complaint says.
The elder Zalaffi told his wife to leave the house and call police. When she returned to the kitchen, she saw her son performing CPR on her husband.