By January 1975, Ted Bundy had moved to Utah. In mid January, 1975, he murdered a woman in Colorado. I noticed the first newspaper link mentions the bodies of two of his well known victims being found nearby where Nellie lived. I'm not exactly sure what he was doing past a certain point in Jan of 1975. The Ann Rule book about him ( she knew him) called "The Stranger Beside Me" says he was visiting a young woman in Seattle until Jan 23. I couldn't seem to find any info on what he did after that. Apparently, the police at the time thought Nellie Davis's disappearence was linked to her being despondent in recent months, judging from the newspaper articles.
Ted Bundy Killings: A Timeline of His Twisted Reign of Terror