(CNN) -- Police are examining grainy hotel surveillance video and following up on new leads, including a reported sighting, in the case of a 17-year-old girl who traveled to Myrtle Beach, South Carolina, for spring break last week and then disappeared.
Brittanee Marie Drexel's mother says she thought her daughter was at a beach in New York, not South Carolina.
The possible sighting of Brittanee Drexel was on a bus Wednesday morning in the Myrtle Beach area, according to police, who later showed photos of her to passengers.
As investigators try to build a timeline of the events leading to Brittanee's disappearance Saturday night, they are also scrutinizing hotel security video for signs of a young woman in distress, or other clues.
Brittanee's mother, Dawn Drexel, told HLN's Nancy Grace that she had forbidden the Rochester, New York, high school junior from going to Myrtle Beach, a popular destination for high school and college students on spring break.
Although they stayed in touch by phone and spoke on Saturday, Drexel said she believed the girl was in Rochester when she actually was in Myrtle Beach.
"I didn't have any idea that she was going to do this," Drexel said. "I do trust my daughter, and she needed to cool down a little bit because she was upset that I wasn't going to let her go."
Drexel said her daughter rode there in a car with several friends. She thinks Brittanee used money she had earned and borrowed to finance her trip.