Patrick Fatta is charged with two counts of possessing child pornography and criminal use of a communication facility. Police say the Lancaster County Computer Crimes Task Force traced illegal videos and photos to Fatta's desktop computer.
"They were able to track that an IP address, a local IP address, was downloading child pornography from known child pornography websites," says Chief Mark Pugliese of West Hempfield Township Police.
Officials say they're talking to students and there's no indication anything else happened.
"We want to be able to provide them as much information as we can legally do so in response to whatever questions they may have," says Dr. Chris Adams, assistant superintendent of Hempfield School District.
They say Fatta had limited interaction with most students. He's worked as the diving coach since 2010.
One parent says he's a good coach who has always been respectful with her daughter.
Police say Fatta used the search term "Pre-Teen" to find the porn. When they interviewed him, police say he admitted he had a problem.
Fatta was released on $10,000 bail. He's being kept under house arrest with electronic monitoring.