The men were arrested about a week apart in two separate cases after detectives with the Jeffersonville Police Department's Internet Crimes Against Children unit received multiple cyber tips from the National Center for Missing and Exploited Children.
Timothy Boden was sentenced after he was convicted of one count of enticement of a minor and one count of sex trafficking a minor.
He was arrested and charged with four counts of child molestation, five counts of child exploitation and other charges.
Attorney Andrew Achey, who has been representing Kegan Kline, has filed a motion to withdraw from the case.
His unexpected plan to plead guilty raises questions about whether he will provide information to investigators in the murders of Abby Williams and Libby German.
Prosecutors say he was caught with videos of young girls in a bathroom.
The FBI Louisville, Homeland Security Investigations (HSI), and the Louisville Metro Police Department are investigating the case.
Dennis Wadzeck is charged with six counts of "possession of matter portraying a minor in a sexual performance."
Police say Robert W. Brown Jr. was taken into custody as he got off the flight.
Andrew Schmidt will be supervised for the rest of his life after he completes his sentence.