Investigators Arrest Suspect for Child Sexual Abuse, Seek Additional Victims 

December 25, 2025 – Yorba Linda, CA – Orange County Sheriff’s Department officials report that on Wednesday, December 24, 2025, Orange County Sheriff’s Department Special Victims Detail (SVD) investigators arrested Jacob Alexander Demmin, 25, of Yorba Linda, following allegations he groomed and had an inappropriate sexual relationship with a minor female.

In December 2025, Special Victims Detail (SVD) investigators were contacted by the victim after she learned that Demmin was still coaching minor children. The victim reported that in 2021, while Demmin was employed as a gymnastics coach at Firestorm Free Running and Acrobatics Gym in Santa Ana and Westminster, he groomed her, engaged in inappropriate communication and had an inappropriate sexual relationship with her while she was a minor.

During the investigation, SVD investigators learned that Demmin currently works as a gymnastics coach at Ultimate Ninjas Gym in Anaheim Hills, Calif.

Demmin was booked into Orange County Jail for PC 286 (B)(1), sodomy with a person under 18 years; PC 288.3(a), contacting a minor with the intent to commit lewd acts; PC 287(C)(2)(A), sexual penetration with a foreign object; PC 647.6(A)(1), Annoy or molest a victim under 18, and PC 261.5(C), unlawful sex with a minor.

Due to Demmin’s access to minors through his employment, SVD investigators believe there may be additional victims. Anyone with information, or anyone who believes they may have been a victim, is urged to contact the Orange County Sheriff’s Department Special Victims Detail at 714-647-7419 or 714-647-7000. Anonymous tips may also be submitted to Orange County Crime Stoppers at 855-TIP-OCCS.

Source & photo: Orange County Sheriff’s Department