Investigators have also visited a downtown office kept by Birgfeld, according to the Grand Junction Sentinel, in which they reportedly found a massage table and what appeared to be acupuncture equipment. Birgfeld was not licensed to practice acupuncture in Colorado. Gierhart would not confirm or deny the visit.
Early in the investigation, authorities found Birgfeld's 2005 Ford Focus burning in a parking lot about three miles from her home. The burned out car provided no additional clues about where the woman may be.
In addition to the escort agency, the reported acupuncture shop and chef's consulting business, authorities also say that Birgfeld sold baby products.
All the business endeavors, Gierhart said, may have put her in contact with someone involved in her disappearance.
"She had several businesses, which means she had lots of customers," Gierhart said. "That's a lot of people we need to interview, and they're all people of interest."