Search for Edgemont girl heats up; surveillance tape may hold clue

Indiana police are stepping up the search for a missing Edgemont girl today, using helicopters to search waterways, railroads and rooftops.

Click "NEXT" below your video player for more on the people identified by police as persons of interest in the case.

Indiana University student Lauren Spierer was last seen in the early hours of June 3 as she left a bar in downtown Bloomington to head back to her apartment.

Using surveillance video from the area, police say they've zeroed in on a car that circled the block around the time she vanished. Police plan to enhance the footage to try to determine the driver's identity.

Authorities say they have 10 persons of interest in the case, including Spierer's boyfriend and other people who spent time with her that night. They say they've already taken DNA samples, administered lie detector tests and questioned several people close to the college student.

Police are also investigating whether Spierer was using cocaine prior to her disappearance.

Spierer's Edgemont parents are in Indiana to help hundreds of volunteers in search efforts, and they say they're not giving up hope that she'll turn up alive. Search for Edgemont girl heats up; surveillance tape may hold clue in INMissing Edgemont girl in IN gets national attentionPolice questioning persons of interest in missing student case

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