Police arrested 52-year-old Anthony Lee Friebel, of Kristi Drive in Garner March 30 as he exited a plane at RDU Airport. He was away on business during the discovery.
Friebel is accused of videotaping the two girls, then ages 11 and 12, and also possessing child pornography during a search of his residence on Friday.
Friebel, who worked at SAS as a computer engineer, allegedly rigged a high-tech network of cameras controlled from a secret workshop in his basement.
According to a search warrant, a boyfriend of one of the victims was trying to fix the internet connection in the basement when he found the nude photos and videos the girls.
"We found 600 DVDs of shower scenes, of me and my sister, hidden cameras in our bedrooms of us undressing. It's just, it's sick," said the victim, who asked to remain anonymous.
Family members said they then found cameras plastered into the wall, and hidden in a bathroom exhaust vent.
The woman told ABC11 that Friebel used fear and intimidation to virtually hold the family captive, and that they were banned from the basement.
"He had alarms on our doors so it would make a noise when we would leave the bedroom and the bathroom," the victim said.
Friebel's stepchildren say they are not just victims of unknown surveillance, but also physical abuse.
"We have to relive it. It's not bad enough we find the hidden cameras and the footage of us, but for him to actually physically touch us, it's sick," the victim said.
Friebel faces multiple charges including two counts of secret peeping, two counts of taking indecent liberties with a child, and one count of first-degree sexual exploitation of a minor.
Friebel was jailed under a $1.5 million bond.