Two young people dove into the Saint Johns river .. one of them never surfaced. We've learned his name is Ruben Dachote. The scene is just off Reddie Point Preserve along University Boulevard north. The police marine unit pulled another person from the water ... Who is expected to be okay. Channel 4's Vic Micolucci joins us live from Reddie Point ... Vic, how long ago did they find Dachote's body? 3 3 3 VIC LIVE IN: There are numerous police officers out here, a helicopter, boats and even the dive team... 00-0612-1647-53PKG:02:47 the tide was really strong. Pulling hard. And it took them right under.Mike Aders saw it all this morning as he was fishing nearby... he saw a group of young people at the park, enjoying themselves. 02:34 they walked all the way down to the end, they were kind of hanging out. They came back to the floating dock and actually stripped down on the floating dock, ran down it, and jumped off. They were having a good time. Yes.But the good time quickly turned frantic ... when the two people who jumped in ... couldn't get out ...swept away by a swift current.04: O2 they were both right there at the top and one that gentleman tried to get the other young gentleman out after he started screaming for help.But like I said, he lost his grip on him and he went under.Police arrived within minutes... a Jacksonville Sheriff's Office boat rescued one young man...but couldn't find the other.57:42 he's fine. He's on the shore and he's talking and he's being of great assistance to the investigation.Our eyewitness, Mike Aders, says it was a horrible thing to see ... and his thoughts go out to the families of those involved. 03:40 they got swept out so fast it was no way to jump in and get to them. VIC LIVE OUT: Poliqce haven't released the identities of those involved in the incident...only telling us they're young adults. But our witness says they appeared to be teenage boys. He says the current swept them away from the dock and toward downtown. Vic Micolucci, CH4, TLS. Vic ... did anyone GO in try to rescue Ruben Dachote?