Herrmann's ex-husband Larry Maynard told WBNS-TV that a co-worker went inside the home and saw blood and things out of place before calling police.
Barber and other sheriff's deputies would not comment to ABCNews.com.
Herrmann's boyfriend Greg Borders told the Columbus Dispatch that the couple lived together but were in process of breaking up. He last said he last heard from her Wednesday via text message.
"We were both going to go our separate ways," he told the paper. "We were fairly civil, as civil as you can be living in the same house when you're broken up."
A spokesman for the FBI field office in Cincinnati said the agency was aware of the incident, but could not comment on whether it would cooperate in the investigation.
Spring's car was found outside Herrmann's home Thursday. Herrmann's pickup truck was at the home Wednesday when the boyfriend reported her missing, Barber said, but it was found abandoned Thursday night at nearby Kenyon College.
Police alerted the college that they believed the car may have been left there by a person involved in the group's disappearance.
The college sent out an e-mail to students Thursday night, alerting them that "local law enforcement advised of a potentially dangerous person in the vicinity."
A spokesman for the college, however, told The Associated Press that the lockdown was purely precautionary and administrators did not believe students were ever at risk. The lockdown was lifted at 7 o'clock this morning.