The police knew of the plot, but didn't stop the attack. Via the Daily Mail:
Four men launched a horrific attack on a teacher in which they slashed his face and left him with a fractured skull because they did not approve of him teaching religion to Muslim girls.
Akmol Hussein, 26, Sheikh Rashid, 27, Azad Hussain, 25, and Simon Alam, 19, attacked Gary Smith with a Stanley knife, an iron rod and a block of cement.
Mr Smith, who is head of religious education at Central Foundation Girls' School in Bow, east London, also suffered a fractured skull.
The four now face a jail sentence.
Detectives made secret recordings of the gang's plot to attack Mr Smith prior to the brutal assault.
The covert audio probe captured the gang condemning Mr Smith for 'teaching other religions to our sisters', the court heard.