A Spokane sex offender will spend the rest of his life in prison for his role in a child pornography enterprise that triggered a worldwide criminal investigation, a judge ruled Tuesday.

Warren King Mumpower, 65, was the last of seven defendants from across the country sentenced to a life term by Senior U.S District Judge Lacey Collier in Florida. He was also fined $25,000.

Mumpower was convicted in January for participating in a complex system of pseudonyms and encrypted files that aided in the distribution of more than 400,000 images and videos of child sexual abuse.

He was arrested in February 2008 by FBI agents who searched his home at 1429 E. Courtland Ave., one of six Spokane locations where Mumpower had lived since moving from Florida in the 1980s, where he served prison time for child molestation.

Five additional defendants in the United States were sentenced in March to prison terms ranging from 164 months to 365 months.

Read past coverage of Mumpower here and here

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