A chiropractor in Chicago's western suburbs stood charged Thursday with secretly videotaping his patients — some of them children — while they were unclothed.

Dr. David Hanson, 43, was charged with multiple child pornography counts — five counts of producing, three of disseminating, and six of possessing, according to the Kane County State's Attorney's office. He was also charged with making an unauthorized video recording of a minor through or under the clothes.

All the counts against Hanson are felonies.

In September, a tip came into the cyber sex abuse hotline, and investigators said it led them to Hanson's house, where they found child pornography on his personal computer and cell phone, and then found more than 180 videos from his chiropractor's office in Batavia. 

"We do know it is an excessive amount of child sex abuse material, as well as other unauthorized recordings that were found through this investigation," Kane County State's Attorney Jamie Mosser said.

The victims were mostly female, and ranged in age from young children to adults, prosecutors said.

"The age ranges, we believe, are at a minimum of three and then it goes beyond that," Mosser said.

Many of the recordings appeared to be taken from a red-light room used for red-light and infrared therapy, which requires a person undergoing the therapy to undress, prosecutors said. 

"This is therapy that's more for skin-related, and so this is something where they would either be fully nude or partially nude to get most effects from it, and a lot chiropractic offices have this," Mosser said.

Hanson made illegal recordings of patients using hidden cameras surreptitiously placed throughout his office, prosecutors said.  

Separate from the recordings prosecutors said he made, Hanson was also found to have possessed and disseminated multiple videos containing child sex abuse material, prosecutors said.

Armed with a warrant, authorities searched Hanson's home and his chiropractic office, at 1928 W. Wilson St. in Batavia, on Wednesday, prosecutors said. Hanson was arrested Wednesday night.

He appeared for a detention hearing on Thursday, where a Kane County judge deemed him a threat to the community and ordered him held in custody, prosecutors said. He is due back in court on Monday morning.

It was not clear as of Thursday how long Hanson allegedly had been recording patients, which is why prosecutors were asking any of his patients to contact them to verify if they might have been one of his victims. 

"It has to be terrifying for those individuals. We don't know if they were live-streamed. Again, that's something we're tying to go through our forensic analysts, and we're trying to see if any of this was shared," Mosser said.

Prosecutors said anyone who believes they or their children were victimized by Hanson, or who has additional information that law enforcement should know about, should call 630-444-3322, or email SAOVictimHotline@KaneCountyIL.gov.

"People should not be afraid or ashamed as a result of this. They went in for treatment, and they went to somebody that they trusted, and somebody who was trusted in this community, and that trust was violated by him," Kane County State's Attorney Jamie Mosser said.