There is no excuse for possession of child porn. Media and journalists have used this excuse before. But when somone kicked the tires of their excuse, they were found to be doing what they were caught doing...downloading, possessing and transmitting child pornography.
Law enforcement have worked for years with journalists doing credible and verified research. I don't know this radio show host and don't want to comment on his guilt or innocence. But I can comment on his wisdom.
ABC News: Radio Host Claims 'Research' Into Child Porn