Tammy Dickinson, United States Attorney for the Western District of Missouri, announced that a Joplin, Mo., man who is a convicted sex offender was sentenced in federal court today for receiving and distributing child pornography over the Internet.Donnie Ray Sumner, 44, of Joplin, was sentenced by U.S. District Judge Beth Phillips to 15 years in federal prison without parole. Sumner has a prior state felony conviction for possessing child pornography.On April 23, 2014, Sumner pleaded guilty t…