Random thoughts
Why didn't the cell phone melt with that intense heat so close to it? Or water damage. Per Dixon "#2 found by tree near driver door about 2/1/2 feet away and the back of phone #3 "maybe another foot from phone"
I had a random thought that maybe the cell phone back being off if someone called could have sparked? or static spark
http://mde.maryland.gov/programs/LAND/OilControl/Documents/Dos and Donts at the Gas Pump 7 pgs.pdf
What gear was the car in? (something mentioned I read something to look at)
The whole crime scene of the car was contaminated (trying to put the fire out and walking up to make sure no one else inside)
Water from drowning out the fire washed away any potential prints JC also
Any potential other tire tracks from another vehicle also messed up.
DA theory is potentially had sex due to her clothing she had on. But 1) there was clothing found outside the car per Dixon "2-3 feet away in both a little creek of water by gate and grass area" JMHO she possible got out of them asap. 2) panties appeared to be in appropriate way, even considering all she been through. They found her bra cant remember her back if burned or not. Not known to me where the bra fastened front/back. If she came in only panties, the clothing JMHO would still been in car burned up or thrown away somewhere else - not scattered 2-3 feet and in water and on grass are.