i think she was setting someone up( why would you leave your purse in it?)
however, i wonder IF she had the gas, would she have just driven to a remote spot, put flamable agent in the trunk, lit a match and throw it in, run like hades? definately would have destroyed that "damn body" smell.. as well as the hair w/ the "death band" in it, other evidence..sure they would probably get the VIN, track it, but by that time, ica would have quite a head start..
if she had thought of that, thank GOD she never had the chance to carry out that plan, and walk away to live "bella vita" car ran out of gas first...
far fetched, i know, but i have wondered..