Victoria Police on Sunday asked gang members involved in the Deer Park killing to look within their own consciences and help them identify the person who stabbed the teenager.
The 15-year-old died on Tuesday last week after he and his cousin were allegedly approached by a group of about 10 youths armed with knives near Brimbank Shopping Centre.
Seven boys, aged between 13 and 16, have been charged with violent disorder and affray but no one has yet been charged with Solomone's death.
