Editor’s note: This story contains graphic descriptions that some readers may find disturbing.

“Real Housewives of Atlanta” alum Kim Zolciak‘s son has been arrested for alleged sex crimes.

The 15-year-old, Kroy “KJ” Jagger Biermann Jr., is facing charges of aggravated sexual battery and aggravated sodomy, according to an Aug. 19 criminal complaint obtained by USA TODAY.

The incident allegedly occurred on the afternoon of April 23 in the family changing area of a Life Time gym in Fulton County, Georgia, where the alleged victim ran into Biermann, who was dating her best friend at the time. The next day, police were called to a local hospital after the girl told her grandmother she had been assaulted.

Biermann was arrested Aug. 17 and remains in custody without bond.

Biermann’s attorney Jason Sheffield denied the allegations in a statement to USA TODAY Friday, Aug. 21: “First and foremost, this is not the kind of information that should be for public dissemination. These are juveniles. Secondly, my client is 100% innocent and tried to present evidence to the arresting officer,” which included a voluntary polygraph test and alleged evidence of “prior false allegations by the alleged victim.”

Sheffield further noted the results of a sexual assault kit showed no evidence of male DNA on or inside the alleged victim, which the report confirmed. He also said he feels “certain” Biermann would not have been arrested if the officer sat down with Sheffield to talk.

“Sadly, these false allegations are a desperate cry for attention and are motivated by my client’s past rejection of the alleged victim’s unwanted advances,” Sheffield continued.

Sheffield called the arrest without bond “a tragedy” and reiterated that Biermann “is not only presumed innocent, but is in fact, innocent.”

Zolciak also broke her silence in a statement to Page Six, calling the allegations “nothing short of reckless and deeply troubling.”

Zolciak also told the outlet that “false accusations” can have “devastating consequences” for the person being accused, and “for genuine survivors of sexual assault and abuse.”

“Every legitimate allegation deserves to be taken seriously and investigated based on the facts and evidence. At the same time, no one should be publicly condemned based solely on an accusation,” she concluded. “We remain confident that the facts and evidence will establish the truth, and we ask that people allow the proper process to take its course rather than spreading unproven allegations.”

Biermann is the third child and eldest son of the reality star and her ex-husband Kroy Biermann, who share six kids in total – KJ, 15, Kash, 14, and twins Kaia and Kane, 12, along with Zolciak’s daughters from a previous relationship Brielle, 29, and Ariana, 24, whom the former NFL player legally adopted in 2013.

USA TODAY has reached out to a representative for Zolciak for comment.

KJ Biermann allegations explained

The alleged victim told police she was eating at the gym café after a workout when she saw Biermann and called out to him. He asked if she wanted to go into the co-ed sauna together, which is accessible through the family locker room, per the report.

Once they got inside the locker room, the victim alleged Biermann “grabbed her by the waist and started kissing her neck and grabbing her butt.” He then allegedly began touching her genitals from over her clothes “so hard that it hurt.”

She said she told him no “multiple times” and he allegedly replied “something to the effect that she was lucky he wasn’t making her do it” before pulling down his pants and orally sodomizing her, according to the report. The girl alleged Biermann also digitally penetrated her and “tried multiple times to have sexual intercourse.”

She was finally able to get away, the report said, and confessed the alleged incident to her grandmother the next day after skipping school and having a panic attack.

At the hospital, she had a sexual assault examination done and told officers that she and Biermann had consensually kissed once before, but she did not consent to any of their sexual interactions the day prior and “did not want her first time having sex to be with her best friend’s boyfriend.” She added that Biermann previously dated other of her friends as well.

Police launched an investigation, during which they learned that Biermann had not scanned into the gym that day. However, surveillance footage later revealed he was in the gym and showed him entering the family locker room with the alleged victim.

They were inside for approximately 30 minutes before footage showed Biermann head toward the sauna alone and the girl exit to the lobby shortly after. The sexual assault kit returned no evidence of male DNA in the victim’s mouth or genitals, the report said.

On May 18, the report stated an officer spoke with Kroy Biermann Sr., who said he and Zolciak would discuss letting their son talk to authorities. On June 24, Sheffield called the officer to inform that he would be representing Biermann in the case.

Sheffield said in his statement to USA TODAY that he “will work tirelessly” to prove “the mean spirited nature of these false allegations and to bring a close to this matter as quickly as possible.” He also asked that the public not make assumptions about the truth and “give the families on both sides their space and privacy.”

If you or someone you know has experienced sexual violence, RAINN’s National Sexual Assault Hotline offers free, confidential, 24/7 support to survivors and their loved ones in English and Spanish at: 800-656-HOPE (4673) and Hotline.RAINN.org and en Español RAINN.org/es.