Investigators found gun that might have been used by Julian's murderer, to kill the child. William Balfour, the stupid monkey in the picture, declares he's innocent.

Reports say that:

"Police, yesterday, sent about 100 personnel to the area near 13th Street and Kolin Avenue to search for evidence. The handgun was found around 1:30 p.m. about a block from where the vehicle was parked along the street.

All three victims were shot to death. King, was shot twice in the head with a .45-caliber weapon, the same caliber used in the murders of his uncle and grandmother, authorities said. Chicago police targeted Jason Hudson, Jennifer’s murdered brother, and Gregory King, the father of Jennifer’s murdered 7-year-old nephew Julian for drug dealing in 2002.Both men allegedly sold crack cocaine to a registered informant.

Cops then raided the very home where Jason was murdered last week. According to documents, Jason, Gregory and Julia (Jennifer’s sister) were all arrested. Julia was never charged with a crime. Jason was charged with cocaine trafficking, but the main count was dismissed in 2004 because the judge ruled police conducted an illegal search.

During that hearing, Jennifer’s mom had to choose whether to go to Hollywood to watch her daughter on “American Idol” or be in court…she chose the latter. Gregory was convicted. Jason agreed to enroll in a drug abuse program and the less serious remaining charge was dismissed.

Cops say Jason and Gregory were affiliated with the gang, Gangster Disciples. That’s the same gang that William Balfour, the “person of interest” was in. The lawyer who repped Jason told TMZ cops often jumped to conclusions and assumed people in that neighborhood were gang members."

There are also some other reports from TMZ:

"According to the papers, when Balfour was pulled over on June 19, police allegedly found cocaine on the driver’s seat of the car and he was subsequently arrested.

But a parole supervisor declined to issue a warrant to revoke his parole. The primary suspect in the murders of Jennifer Hudson’s family insists he’s innocent –- but won’t take a lie-detector test.

William Balfour told cops he had a “good relationship” with the Hudson family, reports the AP, but when they asked him to take a polygraph, refused and “stopped cooperating” with detectives. Balfour still hasn’t been charged, but cops are still honed in on him as the possible killer."

Stay tuned, there will be more news about Hudson's family!