JMO
Since the car was driven over 30 miles away and also set fire , i do think it is the same guy that set fire in the house. Same MO to set fire to destroy evidence. So right now, I think it is 1 guy that was mainly involved and he knew one of the help.
The car was headed to Maryland so I wonder if his residence is in Maryland. He either arranged to get picked up there near the car or his own car was there near where the Porsche was.
So he had to have arrived at the house some other way. Either someone dropped him off or he took a cab or some mass transit to get close to the house.
Since he seemed to know about the families financials somehow, i tend to lean towards being in cohoots and getting actual help from whoever he knew that was working at the home. Either the maid or maybe even one of the other help that did maintenance for the home.
I just cannot see him accomplishing everythign without talking through the plan with someone who was closer to the home. So I think I am goign with collusion with someone else at this point.
That would explain how he got ride to the home and maybe could explain getting a ride after he dumped the Porsche. Because I doubt he burned it too close to wherever he lived. I think he lives in Maryland but not too close to where Porsche was burned. Somehow he knew the spot though.
So many aspects of the perp were amateur in nature. Getting caught on video, carrying buckets around, broad daylight, running instead of walking after setting fire to car, etc.
I think LE will catch him and anyone that helped him. I think right now he was more lucky than skillfull.
Its such a shocking crime and truly sad.