EULESS, Texas - A University of Texas at Arlington mathematics professor was arrested after police said they found hundreds of images and videos of child sexual abuse material on his laptop, according to court records.

What we know:

49-year-old Paul William Leafgreen, of Hurst, was charged in Tarrant County with possession of child pornography involving visual depictions of children younger than 18, and engaging in sexual conduct, according to a criminal complaint filed in October.

Investigation uncovered an IP address

Timeline:

The investigation began in April when Euless police detectives were monitoring a peer-to-peer network known for sharing child pornography, according to an arrest warrant affidavit. Investigators traced a download containing known child sexual abuse files to

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