A Georgia prosecutor revealed in open court that investigators found cellphone videos allegedly showing 15-year-old KJ Biermann having penetrative sex with a family member under 12, a bombshell disclosure that landed while the teen already faces seven felony charges in a separate sexual assault case.
Deputy District Attorney Caitlin McGillicuddy dropped the allegation during a bond hearing Friday in Fulton County Superior Court, telling the judge that the videos depicted "multiple encounters" and that Biermann used "predatory, derogatory" language toward the victim. The family member allegation had not been made public before the hearing, Page Six reported.
McGillicuddy told the court the incident involving the family member was first reported in April 2023 and that Biermann had been placed under court supervision since October 2025 as a result. She framed Friday's disclosure as evidence of a pattern.
"This would now mark the second time he has been charged with an offense of a sexual nature of a very serious kind which involves female victims."
Defense attorney Jason Sheffield declined to comment on the family member allegation. He has consistently denied all accusations in the separate sodomy and sexual battery case that put Biermann behind bars in August.
Biermann was arrested on August 17 and taken to the Metro Regional Youth Detention Center in Atlanta, where he has been held without bond. The charges stem from an alleged April 23 assault on a female classmate, described as a high school freshman, inside a changing area at a Life Time Fitness center in Alpharetta, Georgia.
A Fulton County grand jury indicted him on September 3 on seven counts: aggravated child molestation, aggravated sexual battery, aggravated sodomy, three counts of aggravated sexual battery against a child under 16, and false imprisonment. Under Georgia law, specifically SB440, which gives adult superior courts jurisdiction over teenagers aged 13 to 17 accused of certain violent felonies, Biermann is being charged as an adult.
Sheffield has filed a motion to transfer the case to Fulton County Juvenile Court, arguing that his client "is an adolescent whose development is ongoing." The stakes are severe: the aggravated charges carry a mandatory minimum sentence of 25 years in prison without the possibility of parole.
The classmate was examined at Wellstar North Fulton Medical Center the day after the alleged assault. No male DNA was found in her mouth or vagina. McGillicuddy nonetheless told the court the victim suffered "documented physical injury," and she described the April incident as "predatory."
The unnamed classmate submitted a written victim impact statement that was read aloud during Friday's hearing. She told the court she has been living in fear and that her family has been targeted.
"No matter who these threats came from directly, I cannot just ignore them or assume that nothing will happen. I am not only scared for myself anymore; I am scared for my family, too. Members of my family have received emails and phone calls because of this situation."
She added one more line that cut directly to the bond question before the judge.
"The thought of him being released scares me more than I can put into words."
McGillicuddy asked Judge Melynee Leftridge to set bond at $190,000 if she decided to grant release. Sheffield countered with a request for $65,000 and told the court that Biermann's mother, Kim Zolciak, would monitor him at home. The judge said she would issue her decision by Monday.
Cases involving minors held without bond on felony charges rarely draw this level of public attention. But the Biermann name, and the reality-television fame attached to it, has made every court filing a headline.
Sheffield has maintained from the start that Biermann did nothing wrong. After the initial arrest, he told reporters bluntly:
"The fact that he's been arrested and is being held without bond is a tragedy. He is not only presumed innocent, but is, in fact, innocent."
In the bond petition filed last week, Sheffield described Biermann as "a high school student in good standing who has demonstrated strong academic achievement and regularly participates in extracurricular and community-based activities." He also called his client "an accomplished football player who has received scholarship offers based upon his athletic ability."
During Friday's hearing, Sheffield took a softer tone, telling the court his client has suffered personally from the ordeal.
"This has been so traumatizing to [KJ] personally. He is not a boisterous kid. He is somewhat quiet."
Biermann himself remained emotionless throughout the hearing. Sheffield told Page Six his client is "expecting to enter not guilty pleas to all charges" at his arraignment, scheduled for October 14.
Both of Biermann's parents attended the hearing. Kroy Biermann Sr., the retired NFL player who turns 41 on Saturday, arrived alone and sat in the row in front of Zolciak and their 29-year-old daughter Brielle. Zolciak, 48, appeared stone-faced.
An eyewitness who observed Kroy described his demeanor to Page Six:
"You could see it in his eyes. He seemed to be in a very somber mood. It is what you would expect with the week they're having and the stakes if KJ doesn't get bonded out of jail."
Zolciak, the former "Real Housewives of Atlanta" cast member, has previously called the accusations against her son "reckless and deeply troubling." She has pointed to the lack of DNA evidence and said he passed a polygraph. Sheffield stated in court that she is not currently employed and would be available to monitor Biermann full-time if released.
High-profile criminal cases involving public figures and serious sexual charges often produce a gap between the celebrity machinery and the gravity of the courtroom. Friday's hearing in Fulton County laid that gap bare.
Friday's hearing raised more questions than it answered. McGillicuddy revealed that Biermann had previously been charged with sexual battery of a victim under the age of 16, a charge she said had not been publicly reported until that moment. The outcome of that earlier charge remains unclear.
It is also unclear whether investigators have filed separate charges connected to the cellphone videos involving the family member, or whether the videos surfaced only as evidence relevant to the bond decision. The identity of the family member has not been disclosed. Biermann has six siblings, including 14-year-old brother Kash and 12-year-old twins Kane and Kaia.
The victim's impact statement referenced threats and unwanted contact directed at her family, but the source of those threats was not identified in court. Law enforcement's handling of the crimes against children in this case, from the 2023 report to the 2025 court supervision to the April 2026 arrest, will face scrutiny as the case moves forward.
Judge Leftridge's bond decision, expected Monday, will determine whether Biermann goes home to his mother's supervision or stays locked up at the youth detention center through his October 14 arraignment.
A 15-year-old facing a 25-year mandatory minimum deserves due process. So do the victims, and right now, the facts coming out of that courtroom suggest the system owes them answers it has not yet delivered.
