Investigators have said previously that they were confident on Tibbetts' digital footprint, but they did not release any information as to where that was.
Kearney, Missouri is located about 25 minutes from Kansas City.
The original version of this story misstated the first name of the missing Iowa student.
Police searched the area, spoke to witnesses and reviewed surveillance footage.
The truck stop is located more than 230 miles away from where Tibbetts was last seen. He said he believes there is someone out there who is withholding information, either because they think it's too trivial or because they are anxious it will incriminate a loved one.
Tibbetts was last seen wearing dark-colored running shorts, a pink sports top and running shoes. "Just imagine if somebody had taken your Mollie", he told ABC News' Cecelia Vega in an interview Friday on "Good Morning America".
Here is one of the Facebook posts circulating in the case and that a person posted on the Finding Mollie Tibbetts Facebook page comment thread.
Investigators have been looking at various data, including social media and information from a Fitbit that Tibbetts is known to have used.
According to KCCI-TV, several KCCI viewers sent that television station "screenshots of a Facebook post saying there was a possible sighting of Tibbetts and that she 'might have been drugged, looked disoriented and was with a truck driver'". It turned out that report was not substantiated, and investigators have ruled out the possibility that it was Tibbets, Iowa Division of Criminal Investigation special agent Mike Krapfl told the Associated Press on Thursday. Her family reported her missing the next day after she didn't show up for work.
She was dog-sitting that evening for her boyfriend and her boyfriend's brother, who were out of town, at a home where she was living this summer after completing her second year at the University of Iowa.
So far there have been no suspects or arrests in the disappearance of the University of Iowa sophomore.
Tips on the missing student "have been coming in regularly", and 30 to 40 investigators are on the case, Winker said.