there are two conclusions to draw...
either the accelerator had been pushed to the floor the whole time. and he's just trying to get some money...
or, (and possibly more likely since the brake was also registered as pushed to the floor the whole time).
the position sensor on the accelerator pedal was broken, and as far as the car was concerned it was pushed to the floor the whole time, even though this does not reflect the reality of what happened.
The electronic logs would only indicate what the car was recording. Which would be what the car was seeing.
and if the car thought that the pedal was pushed to the floor the whole time this would also explain why it kept accelerating.