(KTLA) - A 46-year-old California man ambushed by vigilante teens after he allegedly provided a girl with nude photos of himself and tried to arrange a sexual encounter with her is, so far, not facing charges.   Prosecutors with the Riverside County District Attorney’s Office said they would not be filing charges against William Vandenbush, a resident of Homeland, California, and sent the case back to the sheriff’s department for further investigation.   The Nov. 15 incident, according to a news release from the Riverside County Sheriff’s Department, unfolded around 4:30 p.m. at Nicolas Road Park in Temecula, California.  Authorities told Nexstar's KTLA that deputies were tipped off that the suspect was allegedly meeting a minor at the park for “sexual purposes.”   William Vandenbush, 46, a resident of Homeland is shown in this undated mug shot. (Riverside County Sheriff's Department) “When deputies arrived at that scene, there were probably 20 other juveniles there,” RCSD Sgt. Diedre Vickers told KTLA.    While many of the teens had their cellphones out and recorded the encounter, deputies detained the 46-year-old and waited for detectives to respond to the park.   23 men accused of coming to Triad to meet minors for sex in sting operation “The investigation revealed that Vandenbush sent nude photographs and agreed to meet a minor for sexual purposes,” the release detailed.    At the time, Vandenbush was arrested and booked at the Cois Byrd Detention Center in Murrieta, California, for allegedly sending harmful matters to a minor, contacting a minor for sexual purposes and arranging to meet with a minor for sexual purposes.  Prosecutors did not explain why they have declined the case thus far.