Jennifer Hudson

Two days after the shooting deaths of her mother and brother, Jennifer Hudson appealed on Sunday for the public's help in finding her 7-year-old nephew, Julian King. In a bid to even further bolster the search effort, Hudson's family is offering a $100,000 reward for information given to the Chicago police resulting in the youth's location.

"We ask that all inquiries be directed to the Chicago Police Department, Area 1 Detective Division at (312) 747-8380," said a statement from Hudson's publicist.

In her initial effort to help find her nephew, Hudson appealed for help via a MySpace blog entry where the Secret Life of Bees star posted a picture of her sister's son. "Thank you all for your prayers and your calls. Please keep praying for our family and that we get Julian King back home safely," the blog entry reads. "If anyone has any information about his whereabouts please contact the authorities immediately."

An Amber Alert remains in effect for Julian, who has not been seen since the day the bodies of his grandmother, Darnell Donerson, 57, and 29-year-old uncle Jason Hudson were found in the home they shared on the city's South Side, reports the Associated Press.

The Amber Alert listed William Balfour, the estranged husband of Jennifer Hudson's sister, Julia, as a suspect in a "double homicide investigation." Citing "his active parole violation unrelated to this investigation," Chicago police have transferred to state authorities custody of Balfour, who at this time is described as a "person of interest."

"Detectives are working 24 hours on this case," a Chicago police spokesperson tells the AP. "There's a lot of forensic evidence. We have to work the evidence and try and solve this case. Most importantly, we want to find the child."

Hudson was reportedly in Chicago with her family over the weekend, though her exact location was not disclosed.