1. Knock wife unconscious.
2. Drag wife downstairs to car, place in car, pour a bottle of jack Daniels down her gullet.
3. Start Car, place car in drive.
4. Pour flammable liquid over front of car and light match.
5. Close garage door and walk away.
6. Get some sleep as it has been a rough day.....
That is my “Clue” theory....
Somewhere in there is “pay off the cops or investigators”....
If she were that sloshed, she wouldn't have noticed the car behind her. Get up with the alarm, get dressed and downstairs to the car and still alert enough to maneuver around the other car but then passed out stone cold at the exact moment of an explosion? BTW, I have a bridge for sale.