Charlene Spierer reached out to her missing daughter during a briefing on the investigation Monday, telling the Westchester County student that "we're never going to stop and we're never going to quit."
"We love you," Spierer said at a briefing in the Indiana college town where her daughter, Lauren, has been missing since June 3 after a night out drinking with friends.
Police said Monday an enhancement of security video from the area where Indiana University student Lauren Spierer was last seen could help investigators identify one or two vehicles that appear in the footage.
Spierer was last seen walking home alone from a friend's apartment early June 3, a few hours after she left a popular Bloomington bar in Indiana.
Bloomington police Capt. Joe Qualters said Monday an ongoing enhancement aims to determine the make of the vehicles captured by the video. He says investigators haven't "made a leap'' into believing the vehicle's driver played a role in Spierer's disappearance.
But Qualters says if it's determined the two vehicles seen in the footage are the same one then investigators will be "curious'' whether the driver was circling the area and might be involved.
Meanwhile, police said an "America's Most Wanted" television show segment about Lauren Spierer generated at least 30 to 40 tips, but so far none of them have led to major breakthroughs in the case.
Police said they are hoping for more tips.
Robert Spierer told reporters at a news conference Sunday in Bloomington that twice-a-day searches for his daughter will continue all week.
She begged anyone with knowledge of what happened to her daughter to come forward and said the family is just looking for answers.
Police have been interviewing people who know Lauren Spierer and have 10 people of interest. They emphasized that those individuals are not suspects.
Investigators have obtained security video from the area where Lauren Spierer was last seen. Police said they are not planning to release any of the footage.
He said video evidence last shows Spierer between 3:15 and 3:30 a.m. on June 3 walking. He wouldn't say whether she was alone or what else the video shows.
Police have said Spierer went to a friend's apartment and left to walk home alone around 4:30 a.m., which was the last time anyone saw her.