Man arrested in connection to the killing of 9 women

"Good police work and good police science led us to Walter Ellis," Flynn said. "These cases, some more than 20 years old, were never forgotten."

Flynn declined to say what the motive may have been.

"I don't think it's possible for me to speculate what would cause someone to engage in these horrific acts," Flynn said.

Online court records show that Ellis pleaded no contest in 1998 to a reduced charge of second-degree reckless injury. He served three years of a five-year sentence, Flynn said.

Chisholm didn't know whether Ellis had an attorney. A message left with Ellis' previous attorney was not immediately returned Monday.

According to the criminal complaint, detectives searched Ellis' home on Aug. 29 and seized a toothbrush and razors that a female roommate said belonged to Ellis. Investigators at the Wisconsin State Crime Laboratory matched DNA from the toothbrush with samples taken from one victim and fingernail samples of the other, the complaint said.

A brother of one of the victims said earlier Monday that his family has carried a great burden since his sister, Joyce Mims, was strangled in 1997 at the age of 41.

"We just hated that it had taken so long for them to find her killer, those women's killer. But you know, justice one day is better than no justice at all," said Terry Williams, 49.

Before Monday, investigators had said they believed one person was responsible for seven deaths. Police now believe he's connected to the deaths of two more women who were both strangled.

The investigation produced breaks in other cases after detectives resubmitted numerous DNA samples to the state crime lab in the unsolved homicides of suspected prostitutes. The work led to progress in at least 10 unrelated killings, authorities said.

Associated Press writer Carrie Antlfinger contributed to this report.

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