Police searching for a missing 22-year-old female college student are scouring surveillance video from the bar where she was last seen, according to WKOW.

The footage was recorded between 11 p.m. on Saturday, June 23, and 1 a.m. on Sunday, June 24, at State Street Brats, the tavern where Nolan was out with a group of friends until she left them at around 11:30 p.m. She hasn't been seen since. The bar is said to have been holding several hundred people.

Click here to read the WKOW report.

Nolan's younger sister said the two women had a phone conversation early Saturday morning, and that was the last anyone had heard from her, said Joel DeSpain, public relations officer for the Madison Police Department.

The family said they knew something was wrong when she wasn't in touch for so long, DeSpain said, saying that the sisters rarely went a day without talking on the phone.

Nolan, originally from Waunakee, had recently bought an apartment and moved to Madison from Whitewater, where she went to school.

Family members said Nolan went to a job interview in Madison on the morning before she disappeared. Just two days before Nolan disappeared, she was fired from a summer waitress job at Orpheum, owner Henry Doane told WKOW.

Nolan was later reported by WKOW to have been seen at a local swimming pier at some point on the day she vanished. A dive team searched that shoreline area but, according to WKOW, there has been no trace of the woman.

“The case is still being considered a missing person case as far as I know,” DeSpain said. "However, we haven’t ruled anything out. The evidence does not suggest that a crime has been committed.”

On Friday, Nolan's mother vowed not to give up searching for her daughter.

"We're going to find you, Kelly," Mary Jane Nolan told family and friends gathered for a candlelight vigil for Nolan. "We're going to be back the way we were before, as a family."

Madison Police said they were doing everything possible to gather leads in the case. Photos of Nolan were handed out around the community, which generated a lot of tips, police said.

“Patrols have been keeping an eye out and officers have walked the shores of Lake Mendota looking for any evidence,” DeSpain said.

The Dane County Dive Team also has investigated area lakes and so far nothing of significance has been found, DeSpain said.

The Nolan family officially reported Kelly missing on June 24, after more than 24 hours without any contact with her.

The Wisconsin State Journal reported Nolan’s mother saying her daughter had not experienced any emotional turmoil in the days leading up to her disappearance.

DeSpain said Nolan was last seen wearing a green, sleeveless, scoop-neck shirt and blue jeans the night she disappeared. She also may have been carrying a handbag.

Megan Janeway, a senior at the University of Wisconsin-Madison and friend of Nolan’s, said the two used to work together at a local club. Janeway said she was helping to find Nolan by handing out flyers and creating a page for Nolan on the social networking Web site Facebook.com.

The Associated Press contributed to this story.

Editor's Note: An earlier version of this story erroneously stated that WKOW had reported that Henry Doane, owner of Orpheum, had been spotted at the local swimming pier where Kelly Nolan was seen before she disappeared. There have been no reports that Doane was seen at the pier.