JEFFERSON CITY, Mo. (AP) — A convicted sex offender has admitted that he had sex with a 13-year-old Alabama girl who was brought to Missouri by the man’s grandmother and mother.

Twenty-one-year-old Michael James Collins, of Fulton, pleaded guilty Monday to transporting a minor across state lines to engage in sexual activity. He also pleaded guilty to committing the offense while he was registered as a sex offender.

Federal prosecutors say Collins paid his grandmother $400 to drive to Alabama and pick up the girl, who he met on a website in 2017. Collins’ mother went along and the women brought the girl back to Missouri.

The Callaway County, Missouri, sheriff’s office found the girl in December 2017 after a cell phone ping placed her at a home in Fulton.

Collins was on probation at the time for a prior conviction involving a child.