Car Accelerates On Its Own problems of the 2000 Toyota RAV4

I sent information previously re my mother's accident but did not have the VIN. She was involved in a single car, fatal front-end mva into a small, resulting in what the mechanic called "incredible damage to engine - it caused more internal damage than you'd think" and he wondered about high speed. I am asking you to look into the possibility of rapid acceleration vs brake issue, resulting in a higher energy (than would be expected) crash. I have the police report etc. Previously, she had never even received a ticket (and was almost 59 yrs old). Thank you.