Hey Bobbisangel .... I think I can answer the question about his arrest.
On June 5th they picked him up for questioning. He denied owning the car and denied knowing anything about the car and Stepha's disappearance.
They needed the car to solve this crime.
After the local community got involved with Mrs. Henry's plea for help, a
tip came in September which led LE to the car.
They ran forensics and found a DNA match to Stepha in the blood left in the car. Enough to issue an arrest warrant for murder but they couldn't find him in S.FL because he was hiding out in NY.
Another tip and LE found him living in his car.
7 months later and this case has a solution.
This Williams character was "known" to Stepha. Maybe in a casual acquaintance kind of way but still he was not a stranger to her.
In the photo of him he looks like a nice looking guy with a friendly face.
Who would think something so awful could happen?