An Oklahoma inmate who used a contraband cellphone to coerce a 12-year-old South Florida girl into producing child sexual abuse material has been sentenced to life in prison, authorities said. Jeffrey Allen Holden, 45, was given the sentence after he pleaded guilty to five counts of production of visual depictions involving sexual exploitation of minors and three counts of coercion and enticement of a minor to engage in sexual activity, the U.S. Attorney's Office for the Southern District of Florida said Wednesday. Watch NBC6 free wherever you are WATCH HERE WATCH HERE The investigation by FBI Miami began in October 2024, after the girl's mother discovered sexually explicit communications between the child and an individual using the name Jeremy on a messaging platform. The communications included text messages, voice recordings, photographs, and videos. Investigators said the girl initially told Holden she was 13 and later disclosed that she was 12. It was discovered Holden had sent the girl sexually explicit photos and videos of himself, and persuaded her to create sexually explicit content, authorities said. Investigators identified Holden through a photo he sent the victim. While he was interacting with the girl, Holden was incarcerated at the Howard McLeod Correctional Facility in Oklahoma, where he was serving a 25-year sentence for rape. Authorities searched Holden's prison cell and found a contraband cellphone. Even a lengthy prison sentence for rape did not stop Jeffrey Allen Holden from seeking out and sexually exploiting another vulnerable victim, U.S. Attorney Jason A. Reding QuiƱones said in a statement. From his prison cell, he used a contraband phone and a false name to manipulate a 12-year-old child into producing CSAM. His life sentence is a just consequence for conduct that was calculated, predatory, and profoundly cruel. #nbcmiami #crimewatchmiami