Image via St. Louis Justice Center

Michael James Bristow, shown in a 2013 booking photo, is wanted for child pornography.

A south St. Louis man is wanted in a child pornography case.Michael James Bristow, 46, was first arrested three years ago after an undercover FBI special agent from Phoenix traced a cache of illicit images to a user going by "Jamesnstl" online, authorities say.The FBI and St. Louis police were able to hone in on Bristow, whose listed address is in the 2000 block of Tower Grove Avenue in the Shaw neighborhood, according to court records. They seized his computer while serving a search warrant on December 10, 2013, and found "numerous files containing child pornography," according to a probable cause statement.In a review of more than 2,000 images and 500 multi-media files, investigators were able to identify more then 700 victims through the National Center for Missing and Exploited Children, authorities say.Bristow admitted he had downloaded the images, according to police.He was arrested on the same day of the search warrant, but he was soon released pending charges from the St. Louis Circuit Attorney. Now police are ready to bring him in.Explaining the three-year lag, St. Louis police spokeswoman Schron Jackson told thein an email, "These types of investigations are complex and require a great amount of resources to complete. Investigators continued to work on this case until achieving a successful conclusion with warrants being issued against the suspect."Prosecutors issued the warrant for felony possession of child pornography on Friday. Bristow remains at large, authorities say.Police ask anyone with information about Bristow's whereabouts to call CrimeStoppers at 866-371-TIPS.