Why would the BBC hide such a piece of news?

This from Heat St is interesting.

'The BBC is facing new questions about why it delayed reporting that a group of Syrian men had been arrested and charged with sexually assaulting a 14-year-old girl in Newcastle.

Heat Street can reveal that the BBC Newsnight programme first knew of the arrests more than three weeks before it broadcast the story, fuelling claims of a cover-up.

Although a BBC spokesman has repeatedly denied that the Corporation deliberately "sat on" the story, Northumbria Police – which arrested those alleged to have carried out the assault – has now confirmed it informed the BBC of the arrests 22 days before Newsnight aired a word about them.'

Why would the BBC delay reporting such news? Maybe because their pro immigration mindset means they try to minimise critical coverage of immigrants?