Because it was unconfirmed at that time.
Moderators should just add an "unconfirmed" tag and/or move the post to discussion when major unconfirmed breaking news is reported that is by it's very nature unconfirmed. Otherwise the strength of FR is diluted.
Apparently the poster was trying to add a video report to the post when he was banned. I imagine that blogs will eventually overtake FR because of anal moderators.