Authorities say a suburban Philadelphia photographer and disc jockey has been charged with sexually assaulting a young woman after luring her to his home for a supposed modeling photography session.

Prosecutors in Chester County say Daniel Milowicki of West Chester and Coatesville works as a self-employed photographer and DJ for weddings, parties and other events who calls himself "DJ Dan Dub C." They allege that he assaulted a woman he met on the Internet after posting an ad for petite models. He then put her in a cage in his basement and threatened to release a recording of the assault online if she didn't "subject herself to another photo shoot with additional sex acts," said investigators.

Milowicki's website calls him "West Chester Pa.'s best disc jockey." Besides weddings, "DJ Dan" also performed at high school dances and children's birthday parties, said investigators.

"This defendant is a classic sexual predator," said District Attorney Thomas Hogan. "He chose his profession, photographer and DJ, to give him easy access to his targets. He progressed from possession of child pornography, to creating his own clandestine pornography, to a sexual assault. His behavior steadily escalated from passive viewing to an aggressive attack."

Pennsylvania State Police also found numerous up-skirt recordings, some that show the defendant setting up the recording devices, investigators said.

The 28-year-old faces more than 300 felony counts, many involving child pornography. He also faces drug charges after police say they found drug materials in Milowicki's home. He posted bail and was out of jail after posting $25,000 bail, according to court records.

Court documents don't list an attorney who could offer comment on the charges; a person who answered the phone at the number on his website hung up. Also, no one answered the door at either of his homes Wednesday.

Hogan stated concern over there possibly being more victims since "DJ Dan" had access to so many young people.

"People who had contact with this defendant should report any concerns to law enforcement immediately,” said Hogan.