OKLAHOMA CITY - A nearly year-long investigation into the sharing of child pornography lands a metro man in jail.

Detectives seized more than one million images and videos from 34-year-old Matthew Hirsch’s northwest Oklahoma City apartment. Hirsch was arrested on Thursday.

Oklahoma City investigators received a tip last year that someone was sharing child pornography online. The criminal intelligence started tracking Hirsch's online activity in October 2017.

“They obtained an order to find out the IP address of the computers so they could trace that to the suspect,” said MSgt. Gary Knight, Oklahoma City Police Department.

They learned Hirsch was allegedly distributing child pornography through a peer file sharing program. Investigators requested a warrant in January to search his apartment.

Court documents indicate they seized a computer tower, an external hard drive and 191 CD's and DVD's. Police said the hard drive alone had 1.3 million images and videos.

“The vast majority of the million and a half images they received were child porn,” said MSgt. Knight.

The devices were forensically analyzed, taking investigators several more months before requesting an arrest warrant. 

“They can’t just assume a disk is full of that,” said MSgt. Knight. “They have to verify and look at each one of those to see if each image is indeed child porn.”

Hirsch was arrested  on multiple complaints including one count of distribution of child pornography, and eight counts of aggravated possession of child pornography.

“Aggravated simply means that it reached a threshold of a certain number,” said MSgt. Knight. “It exceeded that and it makes the charges aggravated which carries a stiffer penalty.”

MSgt. Knight said investigators work will also work with the FBI and The National Center for Missing and Exploited Children to locate the victims in the photos. Unfortunately, he said many of them are overseas and cannot be found.