Father of murdered teen reveals what he learned on social media that helped him find son's body

Benjamin “B.J.” Eastman says after his son, Ben, was missing for three days, he looked into Ben’s social media accounts for clues to his whereabouts.

“We got into his Facebook messenger, got into his Snapchat, just to try to see … And then we got into his messenger and seen five missed calls from Benny. At 3:04 in the morning, finally got through to him,” B.J. tells Dr. Phil in an exclusive interview airing Wednesday. “Five missed and finally, it woke him up and, and that was the end. No phone activity, no nothing after that. So I knew the story ended over there.”

Benny was Ben’s lifelong friend whom he hung out with regularly. B.J. says when his son first went missing, he suspected the 16-year-old was with Benny on a camping trip. But B.J. says that after seeing the call log, he went to Benny’s house and learned otherwise. He says he when he asked Benny if he knew where Ben was, Benny replied, “’No. We were supposed to go camping, and he never showed up.’”

WATCH: Dad Whose 16-Year-Old Was Brutally Murdered Shares Last Conversation He Had With Son

Four days after disappearing, Ben’s body was located in a shallow grave on property owned by Benny’s relatives. Benny and his older brother, Jonathon Adamson, are accused of luring Ben into the woods for a camping trip and then raping him with an object and beating him to death. Both have been charged with first-degree murder, rape, tampering with evidence and unlawful disposal of remains. Both have pleaded not guilty to the charges.

On Wednesday’s episode, B.J. recounts what he says happened when he went to Benny’s house in search of answers. Check here to see where you can watch.