Two women have been stabbed in an East London park in separate attacks, less than 3 weeks apart.
Police are warning the public to be vigilant after the women were assaulted in Wapping Woods.
As Nick Thatcher reports, detectives are linking the incidents.
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Officers were given the touching letter at Brixton Station while they were on a reassurance patrol after yesterday's attack
The 52-year-old had previous convictions for violence but was not on the anti-terror watchlist.
In a statement Charlton Athletic said: Keith was a true hero who will be greatly missed by all the Charlton family and everyone at the club.