I don’t have time to research it, but I think you are thinking of a similar but different case. I think in that case the woman won $5000 and the perp followed her home and abducted her when she got out of her car, and I think her body was found in a cabin. Christie, as I recall, was very good at blackjack, and on this night was at first winning, but then was losing.
We had a case about 10 years ago where a college student won a nice chunk of change at the Peoria river boat. If my memory serves me, it was around $25K. 4 people in 2 separate cars followed him back to Champaign and robbed him when he exited the car. They got caught through surveillance video and cell phone records. Fortunately, no harm came to the student.