A St. Louis man who worked in Crestwood was sentenced to 10 years in prison Wednesday for possessing child pornography on his cell phone, among other charges.

Rodney Grant Sullivan, 55, was sentenced by U.S. District Judge Ronnie L. White after pleading guilty May 14 to possessing at least 450 explicit images of children on his cell phone between April 1, 2017, and May 4, 2018. He had been indicted Sept. 12, 2018.

At one point Sullivan lived in Wright City, and the investigation was kicked off by the Warren County Sheriff’s Office. Deputies in Warren County received a complaint that Sullivan was looking at child pornography on a computer and cell phone. Officers searched the devices and found those images on the cell phone.

Later, the St. Charles County Cyber Crimes Task Force found Sullivan at his place of work in Crestwood. Sullivan had a different cell phone on him, which he allowed investigators to search. They also found pornographic images of children on that phone.

“Some of the images depicted young children engaged in sexually explicit conduct,” the U.S. attorney’s office said in a news release.

Sullivan was previously convicted in 2011 of two counts of sexual misconduct involving a child.

The FBI investigated the case along with the Warren County and St. Charles agencies. Assistant U.S. Attorney Rob Livergood handled the case for the federal government.