BELOIT, Wis. -- Authorities are asking the public to come forward with more information in the case of a Janesville woman who was found dead in a downtown Beloit business on Monday.

Julienne McGuire, 44, was found dead Monday morning. She opened the Edward Jones office building in downtown Beloit at 8 a.m. A co-worker found her dead around 9:30 a.m., WISC-TV reported.

Investigators aren't releasing information about how McGuire died.

"We aren't saying anything about cause of death because that would lead to a motive, which is information that we need to keep close to our detectives when they interview people or actually interrogate them," said Beloit Police Chief Norm Jacobs.

On Tuesday, police confirmed that they've questioned the victim's ex-boyfriend, but investigators said that they aren't calling him a suspect. They did say that McGuire had a restraining order issued last year against him. The man was questioned in the presence of his attorney.

"He gave us some information that will help us with the case," said Jacobs. "And we haven't decided he's a suspect. And we may or may not talk with him again.”

McGuire told the Janesville Gazette last year that she feared for her life after her ex-boyfriend was arrested for stalking her. The man tells the Gazette he has an alibi.

Police said that the murder was an isolated incident, but they wouldn't say if they believe McGuire knew her attacker, WISC-TV reported.

Meanwhile, police continue the search for two big pieces of evidence: a murder weapon and McGuire’s purse.

Beloit police are asking again for anyone working in the downtown Beloit area with information on any suspicious activity to call (608) 364-6800.

The killing is the city's second murder of the year.

Stay tuned to WISC-TV and Channel 3000 for continuing coverage.