“Scared people do strange things”
This is true. And you have to add that he clearly has a drinking problem and might even be going senile at his age.
But that doesn’t change the fact of how the parts of the story keep changing...which makes it all suspicious.
I am back to thinking someone was in that house that they don’t want revealed for whatever reason
Then he shouldn't be allowed out and about at all hours of the morning, to drive while drunk, blow through stop signs, and cause accidents that include bodily harm. He's a danger to society, and himself.