Praying for our town...

Not long after Allegra and I spent an hour in the prayer room (we made a string full of these decorated egg carton things each symbolising someone in the family - Allegra chose - think this was Tita) a young black lad, 16 years old, was stabbed to death just across the street from where we had been looking out on Sutton from our prayer room. Someone praying an hour or so later saw when his Mum arrived... what is wrong with our world?! Why do we cause such pain for each other?! Praying that justice will be done and his killer/s will be found, but also that no more violence will come as a consequence of this...and wondering what else we can do apart from praying...