AURORA, Ill. (AP) – A man arrested on an outstanding warrant was being questioned Friday in Wisconsin in the deaths of four people believed to be family members whose bodies were found in an upscale suburban Chicago home.

State police and FBI officials stopped the 28-year-old man near Portage, Wis., Friday, said Columbia County, Wis., Sheriff Steven Rowe.

Rowe later issued a news release saying the man was arrested on an outstanding warrant from Illinois, but he did not provide further details. He said the man is from Naperville, Ill., near the house where the bodies were found.

Police in Aurora, about 30 miles west of Chicago, found the bodies Thursday in a two-story brick house.

Authorities had gone there to check on the residents after they didn’t show up for work.

No weapons were found in the home, Aurora police Lt. Rusty Sullivan said.

Police identified those killed as Jimmy Chio Tsao, 34, and Katherine Anne Hanson-Tsao, 31, who lived in the Aurora home where the bodies were found, as well as Terrance Michael Hanson, 57, and Mary Lynn Hanson, 55, both of Naperville.

Gary Griese, a friend of Jimmy Tsao, said the Hansons are Katherine Hanson-Tsao’s parents.

Police have not confirmed that relationship, but Sullivan said earlier Friday that “there’s information that may indicate that, yes.”

Frank Bochte, an FBI spokesman in Chicago, said earlier Friday that agents in Los Angeles were among those helping with the investigation.

“A person of interest is believed to have purchased a ticket and flown to California, and we’re very interested in talking to that person,” he said.

In Naperville, police investigating the deaths were at a house Friday that belonged to a relative of the owners of the Aurora home, Naperville police spokesman Joel Truemper said.

The Aurora home was cordoned off by police tape and a small group of people chatted quietly near the front yard, where five bouquets of white and yellow flowers lay between four white crosses.

One neighbor, Lynn O’Neil, 34, said residents were shocked that such an incident could happen in their leafy subdivision with well-manicured lawns and sprawling homes.

“We have 24-hour security, we have a sense of safety here,” O’Neil said. “The neighbors really look out for each other.”

She said James Tsao often played cards with other men in the neighborhood and that he “was a really, friendly nice guy.”

A longtime friend, Mike Cortino, said Tsao came to the United States as a sixth-grader and runs an import-export company, TTT Inc., that ships used computer equipment to Taiwan, where he said Tsao’s parents still live.

Associated Press writers Carla K. Johnson in Chicago and Robert Imrie in Wausau, Wis., contributed to this report.

AP-ES-10-01-05 0020EDT

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