"He advised me he had nowhere to go after he was supposed to check out of the hotel room," Chillicothe police officer Curtis Hays wrote. "He stated he and (the victim) had been living in a semi-tractor until he lost his job."
Also, an arrest warrant was issued Monday in Linn County for Sandner on five counts of forgery. Prosecutors said he wrote five bad checks on the account of another man in August.
Koechner filed for divorce Aug. 13, a week after she received a protection from abuse order against him.
Hughes said the mother, daughter and Sandner are believed to be in a charcoal gray, 2003 Ford F-150 pickup with Missouri license plate 0PJ-718.