TRACY — A Tracy man who was swept up as part of Operation Valley Predator in 2006 after child pornography was found on his home computer, was sentenced to 25 years in federal prison Friday.

Manuel Gutierrez, Jr. 47, was also given a lifetime of supervised release once he gets out of prison by U.S. District Judge Lawrence J. O'Neill in Fresno.


He's also required to register as a sex offender, and has his access to computers, the Internet, and minors restricted, according to a plea agreement struck last November.


Tracy Police Detective Octavio Lopez called Gutierrez one of the "most dangerous" criminals he's ever come into contact with.


"Not only did he have child pornography, he also had pictures of random children," Lopez said.


"They weren't pornographic in nature, getting out of school or other random settings, but he may have been looking for new victims and doing his research. There was no real reason for him to have the pictures, there was nobody he knew in any of them."


Gutierrez plead guilty to one count of sexual exploitation of a minor after a federal grand jury indicted him on four felonies. He admitted to using a digital camera to produce sexually explicit images of a victim less than 12 years old.


Gutierrez was arrested in October 2006, where during a probation check of his residence, images of child pornography were found on his computer, investigators said.


At the time of his arrest, Gutierrez was on probation after being convicted in Superior Court in San Joaquin County for possession of child pornography.


He was one of 135 people arrested during Operation Valley Predator, which targeted convicted sex offenders to determine if they were in compliance with their sentencing requirements.


The operation involved officers from more than 80 federal, state and local law enforcement agencies, including Tracy and Manteca.


"We don't do them as often as we like because it's tough to get all the resources together," Lopez said.


"But when you do have them, you never know what you're going to get, and sometimes you come up on cases like this. It's definitely rewarding to the families that have been victimized by him."