From my layman perspective, yes the measured gravity would be double it’s original value if measured from the same place.
Gravity is an exponential function, so it gets weaker at an exponential rate as you move away from the source. But even if it’s a value of 1.0 at Earth’s surface and .02 at some distant point from Earth, doubling Earth’s gravity would double both values to 2.0 and .04, respectively.
Sounds like a pretty firm case against the alleged. Even his own mother and his daughter’s mom refuted his alibi claims to police.
I’m surprised though that, according to this article, he’s only being charged with fleeing the scene of an accident and not with vehicular manslaughter as well.