Another grainy photo shows her casually rolling her luggage past the luggage belt.
"Mackenzie was picked up by a person in a vehicle at Hatch Park, and the Lyft driver left Mackenzie with that person in the park, stating that Mackenzie did not seem to have any kind of misery," said Tim Doubt, vice president Police chief of Salt Lake, on Monday told reporters. The police can not confirm the brand or the model of the car and do not know which person has hit Lueck ̵
Lyft herself confirmed her route no irregularities and ended at the destination she entered. The driver continued to provide rides immediately after the end of the ride, the company said. "We actively assist law enforcement agencies in their investigations," Lyft said Saturday.
Lueck missed a flight to Los Angeles on the morning of June 23 and she also missed a midterm exam.
Lueck's phone was not on or was not found since June 17, police said. Although no signs of harm were found, Zweifel said, "Given the circumstances of the case, we want to make sure she's okay."
"Mackenzie, we ask that you contact one of the two Salt Lake City police or a law enforcement agency you are in. We want to make sure you are safe and respect your wishes," said Doubt, who noted that sometimes missing persons do not want to be reached.
The police have set up an alert line and ask anyone who calls information at 801-799-4420.
Eric Levenson, Marlena Baldacci and Artemis Moshtaghian of CNN contributed to this report.