Actually I seriously doubt foul play.
I *personally* doubt there was a firebomb. If for no other reason than the car (and structure) was not consumed by fire, and neither was the structure. From the looks of things, the structure was not much involved in the fire. IOW, The pic (small as it was) didn’t look like the result of an explosion and fire. IMHO. [Also, incendiary devices ALWAYS leave evidence behind. Always]
Go with the simplest explanation — the woman was incapacitated (aneurism, alcohol, other) and ‘drove’ (meaning it rolled on its own) her car into the side of the structure of the garage. It idled there in gear for a long time until something in the garage ignited, probably a leaking flammable fluid (coming from a container in the garage).
Since the lower rear of the car was not charred or even soot covered in the photo, one could reasonably conclude the fire did not start or propagate there. If you look closely the headrests in the rear seats are not even melted/blackened, but the glass is broken out — likely something the firefighters did to ascertain how MANY people were in the car when they found it (dark garage/ tinted windows/ no interior lights).
It’s a weird one. WHY would a coherent adult stay in a car ‘on fire’? It doesn’t LOOK at all like a suicide. (again IMHO) I’ll stick with the scenario of an incapacitated driver whose car had a low-speed, minimal impact collision with a structure and its contents, and SOMEHOW a fire ensued.
NET: she was dead, dying or otherwise incapacitated with the car in gear. A NON-PENDING autopsy and COD would be VERY revealing.
I think the piece you may be overlooking is the fire was very hot and very fast. The time-line was EXTREMELY compressed.
Reports were the husband said she left the house to go to work at 4:45 AM. The fire was called in at 4:55 AM and the trucks were there at 5:00 AM. When the trucks arrived the flames had completely engulfed the front of the car and were coming through the roof of the garage. The fire was put out by 5:10 AM.
Somehow within 10 minutes, the front of the car was engulfed in flames. Now they are saying the victim was unconscious prior to the fire. All this in ten minutes?
The Police, Fire, FBI, and ATFE investigators all are still refusing to comment on the “investigation”. The car remains impounded after 30 days.
As you say, a firebomb always leaves evidence. I would venture to guess that is why there is no comment from any investigating agency.
Also at age 37, slim, with no known health issues, leaving for work early on the day of the big merger announcement, I find it hard to believe alcohol or a health issue would render her unconscious immediately before her car ignites.
But then, I could always be wrong!