NEW YORK (AP) -- The Family Research Council has accepted the resignation of Josh Duggar in the wake of the reality TV star's apology for unspecified bad behavior as a young teen. InTouch Magazine reported Thursday that Duggar was investigated for allegedly molesting five underage girls when he was a teenager. Tony Perkins, president of the Washington-based Christian lobbying group, said in a statement Thursday that Duggar resigned because of information becoming public that he believed would "make it difficult for him to be effective." As executive director of FRC Action, he served as a public face of the organization. Duggar, 27, appears on the TLC reality show "19 Kids and Counting." He is the oldest of Jim Bob and Michelle Duggar's 19 children. He posted an apology Thursday on Facebook for bad behavior as a youth. Neither the Family Research Council nor Duggar could be reached for comment. TLC had no comment.