Has there been any discussion into the death of Ross’ father maybe being the final straw for Ross and then he becomes Z shortly after? His father died just a couple months before the first confirmed Z attack. We know, from Allan Silliphant, that Ross hated his father, but perhaps he wanted to mend the relationship and it ended up being too late?

I got one better: what if Ross killed his father and "made it look like a suicide."

Also, anyone willing to bet that Ross was driving around his fathers old car. I doubt his father had much of an estate, but he had a job so he probably had a car. After he died, who got possession of that car? I’m betting it was Ross.

That’s a big leap

Ross’s father died back east, we have no evidence that Ross went back east after his father left.

That’s odd because that is the exact legal wording requiring that a person receive psychiatric treatment and/or confinement. Which we know of course that Ross did. I kind of doubt that he would use that as a self descriptor.

http://www.forensicpanel.com/expert_services/psychiatry/civil_law/involuntary_hospital_commitment.html

The prevailing standard for psychiatric commitment requires a finding that the examinee be dangerous to self or to others in order to be hospitalized against one’s will. Depending on the state, “dangerous’ may include a passive danger to oneself through profound neglect.