Cochran, who described himself as a "good friend" of the suspect, said Sunday night was the first time he'd heard of the allegations.
"All in shock," Cochran told WCPO by telephone Wednesday night. "Never would have guessed.”
Cochran said he drove Niemeyer to turn himself in to police.
It's unknown if the girl had any connection to the church, Cochran said. He said the church conducts thorough background screenings, and none of the activities are alleged to have occurred on church property.
Also Helped With Middle School Prayer Group
Niemeyer volunteered with the Fellowship of Christian Athletes club at Twenhofel Middle School in Independence, Kentucky, according to Kenton County Schools spokeswoman Jess Dykes.
Dykes said the district, like the church, did a background check on Niemeyer, and emphasized he was never allowed to be alone with the children -- it's district policy that at least two adults be present at all times, she said.
Dykes said the club had about a dozen sixth-, seventh- and eight-grade students; they met Wednesday before school, read scripture and prayed, she said.
"We are definitely following up with those students and any concerns they might have, because they've seen it on the news and they know him," Dykes said.
Niemeyer was not in charge of the group, Dykes said, just a volunteer helper. There have been no allegations of wrongdoing on school property, she said.
Niemeyer remained at the Kenton County Jail on Wednesday night, according to the jail website.
What Parents Can Do
Heidi Malott, manager of the Mayerson Center for Safe and Healthy Children at Cincinnati Children's Hospital Medical Center, said the case is a reminder to parents to ask tough questions about anyone caring for their children.
"Our people go through background checks and those kinds of securities in order to make sure that we're not hiring or using staff or volunteers that might have a background of child abuse," Malott said.
She recommended that parents open dialog with their children and let them know it's OK if a child doesn't feel comfortable around an adult.