It appears that the Flume interview was done AFTER the trial. Also, she was picking the car up from Enterprise because she'd had another recent accident. Referencing Becky's Flume link:
....Carucci had just had an accident the day before, which was the reason Carucci was picking up a rental car that day. .....
Carucci disputes that the accident was the day before and even that she was in an accident. Carucci said that it happened two weeks before, and that she had bumped something in the road late at night when she was changing lanes. Carucci also doesn't call it "being in an accident" because there were no other cars involved.
The Flume article also said that Carucci showed no remorse during the trial. Whether she's a sociopath or age-impaired or whatever, she has no business driving. I agree that jail time would not be appropriate but she should never ever have a driver's license again, nor should she have a car in case she's tempted to drive without a license.