It all started in 2010 when authorities received reports of a man taking pictures of women at a tanning place in Escondido.
Police conducted a sting operation and contend they observed Kaye video-taping women as well.
Seven victims were identified, and investigators were searching for additional victims.
He was charged on Jan. 12 with 15 counts of possessing child pornography, because one alleged victim was a minor. He faces 10 other charges that include secret filming.
The Associated Press contributed to this report.