A man arrested on an outstanding warrant was being questioned Friday in the deaths of two men and two women whose bodies were found in an upscale suburban Chicago home.
Police identified two of the people killed as Jimmy Chio Tsao, 34, who lived in the Aurora home in which the bodies were found, and Terrance Michael Hanson, 57, of Naperville. He did not release the women's identities, but neighbors said Jimmy Tsao lived in the home with his wife, Kate.
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.
Police in Aurora, about 30 miles (48 kilometers) west of Chicago, found the bodies Thursday in a two-story brick house surrounded by well-manicured flower beds and a trim, sloping lawn. Authorities had gone to the quiet, immaculate neighborhood that boasts 24-hour security patrols to check on the home's residents after they didn't show up for work. No weapons were found in the home, Aurora police Lt. Rusty Sullivan said.
When Sullivan was asked at a news conference if Hanson is Tsao's father-in-law, Sullivan said "there's information that may indicate that, yes."
Wisconsin State Patrol and FBI officials stopped a 28-year-old man near Portage, Wisconsin, Friday, said Columbia County, Wisconsin, Sheriff Steven Rowe.
Rowe later issued a statement 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, Illinois, a suburb near the house where the bodies were found.
Columbia County Sheriff's Department officials would not comment further. Sullivan said his department had not made any arrests. Frank Bochte, an FBI spokesman in Chicago, said earlier Friday that agents in Los Angeles were among those helping with the investigation.
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 underneath a tree between four white crosses.
One neighbor, Lynn O'Neil, 34, said residents were shocked that such an incident could happen in their leafy subdivision of sprawling homes. Another neighbor, Thomas Kosanda, said Thursday that the Tsaos have no children, AP reported.