A teenager is due to appear in court today charged with the murder of 17-year-old Kwame Ofosu-Asare.
Kwame was found with fatal stab wounds in Adelaide Close on the Moorlands Estate in Brixton, south London, during evening rush-hour on March 2.
A 17-year-old boy from Camberwell will appear in custody at Croydon Magistrates' Court.
Eighteen-year-old Nathaniel Okusanya from Lambeth, London appeared at the same court on Monday charged with the murder.
He was remanded in custody and will appear at the Old Bailey for a plea and case management hearing on July 9.
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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.
London and the worlds has united on Twitter in defiance of the West minster attack #prayforlondon #wearenotafraid