Det Supt Terry Mann on the steps outside the Sheffield club where Joshua Green was stabbed to death in the early hours of New Year's Day.He made a fresh appeal for information despite already speaking to many of the people in the club that night.
"While many people have provided us with statements others have chosen to stay silent or have refused to help."
Four people are answering bail in relation to the killing but no-one has been charged.
More top news
As part of the launch of ITV's 2015 Text Santa fundraiser, we sent Jon Mitchell out to kick off the fundraising.
A photographer's Ford Focus became the unlikely hero when he acted as chauffeur for Public Enemy - moments before they were due on stage.
Margaret Thatcher has beaten the Queen and the first female Nobel Prize winner to be voted the most influential woman of all time.