Woman found in car after car towed away

Mighty strange occurrence this. One day after a car had been towed away from the scene of an accident, the body of an elderly woman was found under the deployed air bag of the car. Rescue services had already been through the car, and her injured son had been picked from the car earlier, so it is all the more strange as to how she came to be missing:

The presence of the body of Shirley Lee Williams, 72, came to the attention of investigators Sunday after family members said two relatives were missing, not one.
"We conducted a follow-up to the tow yard, and we discovered the woman inside the vehicle," said police Officer Mike Lopez. "She was dead."
Doctors will investigate whether Williams died instantly or was alive when the car was towed away, an official said.

This incident could get much serious if it was found that she had not died during the accident, but was alive when the car was towed away; in that case, she could have been saved if she had been found.