Chicago Prosecutors say William Balfour killed Jennifer Hudson's brother, mother and nephew because he was angry his estranged wife was dating other men.
At a hearing Wednesday, prosecutors claimed Balfour came to the family's home the morning of the October 24 murders and confronted his estranged wife Julia Hudson.
Balfour and Julia Hudson left together but Balfour returned to the home; the bodies of Hudson's mother and brother were found there later that day.
Darnell Donerson was 57 and Jason Hudson was 29. The body of Julia Hudson's 7-year-old son, Julian King, was found in an SUV three days later.
Although his defense insists William Balfour is innocent, a judge denied bail.
The prosecutor said Balfour - who was the prime suspect in the murder investigation from the beginning - confessed October 24 when asked for an alibi.
According to the Chicago Tribune, prosecutors debunked statements William Balfour made to police, such as the fact that he said he was at home at the time of the grisly murders, but cell phone records place him in Hudson's neighborhood.