BLACK RIVER FALLS, Wis. -

Black River Falls police are searching for a man after the woman he lived with turns up dead.

Police are investigating the woman's death as suspicious.

Police have not identified the victim, but said the death was not from natural causes.

They said a friend of the woman called police after she unsuccessfully tried to reach the woman several times.

Her body was found in a rental property where she was staying on the 300 block of Chestnut Street.

The property's landlord say her body was found in the bathtub.

Police said she was living with Michael Harmon and that the two knew each other, but would not confirm what kind of relationship they had.

Police are not calling Harmon a suspect, but would like to question him.

“We know that he was with her, and this would have been Saturday evening, and we have witnesses that he was with her while she was still alive and we just need to speak to him,” said Dave Frederick, chief of Black River Falls Police Department.

Landlord Terrance Duffy never expected to see caution tape and investigators surrounding his Black River Falls property.

“Well, you know, I’m shocked that this girl just moved in, like, four days ago,” said Duffy.

He rents out the property behind his house.

Police came Sunday evening to check on the woman.

“I was just freaking out that, you know, ‘Please don't tell me that there's a dead body in my rental,’” said Duffy.

Duffy originally rented the property to a different woman a little more than a year ago.

Harmon moved in with her shortly after.

“He spoke about things that made me uncomfortable right out of the gate, and I knew I wasn't going to want him as a tenant, but I knew I had already locked into a lease,” said Duffy. “I'm just as tied into that as he was.”

During this time, Duffy said, something just wasn't right.

“I've heard many nights where I could sit here on the couch and I could audibly hear their arguing, and then I’d have to go out there a couple of times and say, ‘Hey, this needs to stop,’” said Duffy.

Duffy said he was hoping to do something about the problem soon.

“By law, I have to have a reason to get rid of him and I had a couple violations with the lease with the arguing, so I already had a little bit there,” said Duffy.

The first woman Harmon lived with moved out a couple of weeks ago before the victim moved in.

Now Duffy wishes he could have done something earlier.

“If I could have avoided it, and as many people would tell you, I'd be the first one to step in on something like this,” said Duffy.