Lueth, who is pursuing her second bachelor’s degree in horticulture, was last seen by her friend of eight years, Rick Stilgenbauer. Stilgenbauer has rented a unit below Lueth’s in a home on the 1100 block of Eureka Street in Lansing for the past five months.

Police will try to observe the Thanksgiving holiday, but there will be enough investigators available if any leads break, Mark said.

“We will probably not be as aggressive unless something breaks in the case on those days,” he said.

Lueth’s father must adjust his holiday plans.

“I was planning to spend Thanksgiving with Krista,” Roy Lueth said. “But obviously that’s not going to happen.”

Stilgenbauer and Lueth talked in Stilgenbauer’s kitchen between 5:30 and 6 p.m. on Nov. 11, after she returned from class at MSU.

Following their conversation, Lueth returned to her apartment, and Stilgenbauer said he did not see or hear anyone come or go from her upstairs unit.

Lueth recently broke up with her boyfriend. The two had shared the apartment, but he moved out between Nov. 6 and Nov. 11, Stilgenbauer said.

Investigators have interviewed Lueth’s ex-boyfriend twice since she disappeared, and are trying to contact anyone who might have seen or heard from Lueth the evening of Nov. 11, Mark said.

Krista Lueth has been missing for more than two weeks and her family is assuming foul play was involved in her disappearance, said her sister, Elizabeth Crum.

“Most of my family is processing through this the same way we would with a death, except there’s no closure because we don’t know what happened,” she said.

Anyone with information is asked to call the State Police at (517) 322-1907.