Police were called out to a house after the owner found worrying blood stains under her carpet.
The woman had recently purchased the 110-year-old property in Salt Lake City and began work to restore it to its former glory.
However, a video posted to her TikTok account shows her pulling back the old carpet to reveal seemingly copious amounts of bloodstains.
In the clip, she explained: "There was a surprise waiting for us. We stumbled upon some suspicious stains under the carpet.
"At first, we weren't sure what it was, but the more we found, the more obvious it was blood. Like... an alarming amount of blood."
The incident took a mysterious turn as police were unable to figure out whether it was animal or human blood that was all over the carpet.
She explained: "The police confirmed that it looked like blood, but said they couldn't be sure if it was human or animal without testing it.
"The cops didn't do tests or take samples. They did say it was most likely blood, but that they don't do those types of testing unless they have strong suspicion of foul play."