Miami ? A man was sentenced Friday to 100 years in prison for recording his sex acts with at least 120 children in Cuba and Ecuador, and distributing the videotapes and CDs to customers in the United States.

Angel Rafael Mariscal was found guilty in April of producing, importing and selling child pornography. Judge Cecilia Altonaga said his crimes were so reprehensible “that it gravitates at or near the bottom rung of human behavior.”

She said Mariscal, 45, was able to “perfect the business” as actor, producer and distributor by preying on poor children on his regular travels to foreign countries. Investigators said he charged customers as much as $975 for custom-made videos.

The judge watched excerpts from about 10 tapes as a pediatrician with expertise in child abuse estimated eight victims were under age 12, and 13 more were under 16. “It was difficult to watch,” she said.

Investigators believe Mariscal, who is HIV positive, was in the child pornography business for 10 years. He was arrested in September 2002 in Miami Beach after a mail-order sting and discovery of a facility filled with videos, customer lists and photo equipment.

The Cuban government, cooperating with U.S. investigators, tracked down nine victims using still images lifted from tapes and disks; Ecuador identified three victims.

None of the 12 children tracked down has initially tested positive for HIV.

Pleading for a shorter sentence, Mariscal said he doesn’t have long to live because he tested positive for HIV in 1994. He said he became a sex addict after coming to the United States in 1980 and blamed easy access to pornography in New York’s Times Square.

“When I was engaged in sexual activity with these girls, I really thought I was somehow helping them,” he said. “I knew it was illegal. I didn’t think it was wrong.”