That information was when Spenser Howson tweeted about the police doing something, and he would tell everyone first thing in the morning.
It was stupid of Spenser to even mention it, as they didn't want the media to mention anything about the road block on Moggill road that night so everyone who used the road would do as normal and they could ask questions.
If the media had reported it, people may have avoided that route and gone back across the bridge at Mt Crosby and down the Ipswich motorway. You have to understand at that time of the night, it would have just been early morning shift workers trying to get to work early. Those people would have their drive timed with minutes to spare, and if they heard of a road block they probably would have gone the other way.
I don't believe there primary goal was to interview people that night. IMO they would have been identifying cars and matching them to cars filmed on the CCTV in a hope to eliminate them. So instead of dealing with the 20-50 cars that probably went through between 11-4, they only have to account for 5 (as a guess). One of those 5 unknowns might have been the killer or accomplice.
So IMO the media is hardly gagged. They just don't have any real information to report.
fftobed: