If the police is found out to be lying about this, the public will doubt any future statements.
People will always doubt it. And certain political movements will exploit it.
“yes, the police said it was a white, British man. But do you remember the stabbing incident? They claimed that as well. And we all know who the real perpetrator actually was…“
The police therefore really shouldn’t be encouraged to enter a post-truth/fake news era.
lying about the attackers‘ identities is also incredibly disrespectful to the victims and their families!