Chicago police arrested a man in the deaths of three relatives of actress Jennifer Hudson, a police spokesman said. William Balfour, here in an undated photo, is the estranged husband of Jennifer Hudson's sister, Julia.

William Balfour was first detained for questioning on October 24, the day that Hudson's mother and brother were found shot to death.

Hudson's mother, Darnell Donerson, and brother, Jason Hudson, were found shot to death in their South Side Chicago home.

The body of her nephew, 7-year-old Julian King, was found three days later in an abandoned SUV on Chicago's West Side.