After first reporting that a suspect in the investigation of the deadly Boston Marathon bombing had been arrested, and then walking back that report, CNN has explained the evolution in a statement to TPM:
“CNN had three credible sources on both local and federal levels. Based on this information we reported our findings. As soon as our sources came to us with new information we adjusted our reporting.”
CNN issued a correction on its Facebook page, but it was not clear whether a correction was posted anywhere on the network's website.