JANESVILLE, Wis. -

The discovery of a woman's body in Janesville has police looking for possible connections to the arrest of a man who claimed to have killed three people.

Janesville Police Chief David Moore said the woman's body was found behind a former furniture store at 533 N. Main St. at 5:45 a.m. on Monday. The body has not been identified and is undergoing an autopsy.

Moore said a man arrested in a stabbing incident claimed to have recently killed three people. Before the stabbing, Clayton J. Courtney, 28, said, "I've already killed three people tonight. We are all going to die," according to police. Police said he also threatened to harm the unborn child of a female co-tenant.

Police said Courtney was covered in mud and blood when he was arrested and the mud was not consistent with the scene on Pontiac Drive where he was arrested.

Investigators also said Courtney was believed to be in the area of the Rock River near the Memorial Street Bridge and told others he was going to drink and do drugs with a female friend under the bridge.

The woman's body was discovered by officers as they were searching the area.

Police don't believe the body is that of the missing 75-year-old Mary Coulthard of Janesville, who was last seen in the 200 block of North Main Street about 10 p.m. Sunday. Moore said the body found Monday was that of someone who was much younger.

He said some of Coulthard's property was found on the Milwaukee Street bridge and south of the bridge near the Rock River.

Courtney is not considered a suspect in either case, according to Moore.

Moore said anyone with information about Courtney and his recent whereabouts is asked to contact Janesville police at 608-755-3100 or Janesville Area Crime Stoppers at 608-756-3636.