South Carolina ? Police investigating the slaying of a Clemson University student who was strangled with her bikini top released surveillance photos Friday of a man trying to use her bank card a few hours after the killing.

Prosecutor Bob Ariail said the man, who had covered most of his face with bandanas, tried unsuccessfully to use Tiffany Marie Souers’ card six times at two cash machines. The man was driving an older sport utility vehicle.

Souers, a 20-year-old civil engineering junior from Ladue, Mo., was wearing only a bra when she was found May 26 on her bedroom floor in her apartment a few miles from campus. The bikini top was around her neck.

Ariail said the crime was sexually motivated, but he said tests so far have not indicated she was sexually assaulted. He said more tests were being done.