Irvin Groeninger, Adam Herrman's biological father, called FactFinder 12 as soon as he saw the interview with Doug Herrman.
"I wanted to find him myself," Groeninger said. "I wanted to track him down and ask him questions. I figured if the media can find him surely I can find him. I just have a few questions."
Groeninger said he watched our interview with Doug Herrman. It was the first time he'd heard Doug try to explain why Adam was never reported missing.
"It took 10 years before someone said we need to call the authorities, that doesn't sit right with me," Groeninger said.
FactFinder 12 Investigators found Doug Herrman at a mobile home at Grand Lake in Oklahoma last month. Adam disappeared in 1999, but was never reported missing. Doug Herrman claims Adam ran away.
"What I did by not notifying the police when Adam ran away was terribly, terribly wrong," Herrman said. "I can't take it back. If I could, heavens yes I would. But I can't."
He said he was afraid the state would take Adam and his other children if they reported him missing.
"We were told by SRS that if we ever had any more trouble with anything they would strip the other kids away from us," Herrman explained.
Groeninger doesn't believe him.
"I think he was abused again and it went too far and he didn't recover from it," Groeninger said. "He was probably taken out and buried somewhere to cover it up."
Investigators are working that same theory, but have yet to disprove the Herrman's claim that 11-year-old Adam was an unreported runaway.
We were there as Groeninger sat down with investigators for the first time for an update on the case and where it goes from here.
"I'm skeptical," Butler County Sheriff Kelly Herzet told Groeninger. "Is he alive? My own personal opinion is probably not but I always have hope that we'll get the phone call from him someday from him."
Investigators are working on a new age progression photo. It's been several years since the last one was released.
"That age progression he did is spot on," Groeninger said. "It looks just like my brother>"
Groeninger said the interview with Doug does not sit well with him.
"His appeal, that if you're out there I love you, Mom loves you. I don't agree with that at all," Groeninger said of the interview.
He wants Doug and Valerie Herrman held accountable, but would rather have answers.
"What happened? How was he raised? Where's he at? If he gives me those answers I would walk away. I'd have closure. I'd know," Groeninger said.
There's now a $50,000 reward for answers to those questions thanks to an anonymous donor.
"I understand you being anonymous," Groeninger said. "I love you from the bottom of my heart because it might give me some closure."