The suspect, Roy Pierce, 47, now is being held on $1 million bail at the Kitsap County jail, and his youngest children are staying with relatives.
Pierce, who worked as head of security at Bremerton Lanes bowling alley, never seemed to be the type who would get in trouble, say neighbors, who described him as a dedicated and hard-working father with six children.
"Really did not suspect anything - which is really quite cliche, from what everybody says - but it's the truth," said one neighbor who asked not to be identified.
But investigators say they found thousands of videos and images - possibly more than 100,000 - on CDs and hard drives found in his home on Park Avenue in Bremerton.
Some of the images were downloaded from the Internet, but many others apparently were made inside Pierce's home.
The child porn was discovered when a relative who had been staying with Pierce moved out and accidentally grabbed a box of computer disks that police say belonged to Pierce.
Some of those CDs were full of child pornography. As officers investigated, they realized many of the child sex videos were shot inside Pierce's home - and may even show some of Pierce's relatives engaged in sexual acts, police say.
Investigators are also looking into allegations that Pierce told women bartenders and waitresses at Bremerton Lanes to send him nude photos of themselves - or they would lose their jobs.
And they also say some videos may have been shot by a hidden camera inside his home.
Now some neighbors say they can't believe it.
"Always a kind word, always a nice guy. But I don't know - split personalities of some sort," said a neighbor.
After his arrest, Pierce was booked into Kitsap County jail on suspicion of first-degree child molestation, sexual exploitation of a minor, possession of child pornography and voyeurism.
He goes before a Kitsap County Superior Court judge on Monday.