William Charles Langley, Jr., 40, is wanted for aggravated rape of a child in Crowley, Deputy US Marshal Corey Britt said.
He did not provide information about the age or gender of the child or when the alleged rape occurred.
Langley was convicted of 2nd degree sexual assault in Arkansas and is wanted in Clacasieu Parish for failing to register as a sex offender, Britt said.
Anyone with information is asked to call the US Marshals Violent Offender Task Force in Lafayette at (337) 251-6921 or (337) 515-0392.
Information received will remain confidential and a cash award is available for information leading to Langley’s arrest.