The Wayne County Sheriff's Office recently arrested a 24-year-old Monroe man officials believe to be the largest and most active trader of child pornography in the country.

The investigation began in April, when his case was forwarded from a task force in Colorado to the Wayne County Internet Crimes Unit Investigators and the Michigan Internet Crimes Against Children (ICAC) task force, according to the newspaper.

The ICAC -- funded by a grant from the United States Department of Justice, Office of Juvenile Justice and Delinquency Prevention -- includes officers from the Michigan State Police, Livingston County Sheriff's Department, Lansing Community College Department of Public Safety, Lansing Police Department, Livonia Police Department, Michigan State University Department of Police and Public Safety, and the Sumpter Township Police Department.

According to the Michigan State Police Public Sex Offender Registry, Greene is not registered as a convicted sex offender.

WDIV-TV reported Greene posted a $100,000 cash bond and is expected to be back in the 35th District Court Monday.