Ask yourself who is funding this information, what their agenda is, what their bias is, why they're spreading this information, what they could stand to gain from it, and what their sources are then do research to find the answer to these questions.
For example if you read a article about how the DPRK is suppressing religious expression but the article was published by a Christian missionary organization run by a millionaire televangelist, funded by the US government, and cites its sources as South Korean gossip magazines who in turn cite "anonymous sources" you can safely say that this isn't reliable information on religious expression in the DPRK.