Road checks and witness appeals will be carried out on the Isle of Sheppey in Kent on Friday night, a week after the fatal stabbing of Christopher Alaneme.
Police said Christopher Alaneme died in a racist attack
The black teenager's death in Sheerness is being treated by Kent Police as a racially-motivated killing.
Officers will be on patrol and a mobile police station will be set up in the area around Sheerness High Street.
Three men remain in custody over the stabbing. Another has been bailed and a fifth man is still being sought.
Police named the fifth man on Wednesday as Peter Connolly, aged 29, of Commercial Way in Peckham, south-east London.
Anyone who knows his whereabouts is being urged to contact police.
A 26-year-old and a 29-year-old arrested in London, along with a man who was held in the Maidstone area, are being questioned on suspicion of murder and attempted murder.
Police have maintained a visible presence in Sheerness
Supt Steve Corbishley said: "I am appealing for anyone with any information, no matter how trivial they think it may be, to come forward and talk to us.
"Our officers will be ready to talk to people about this tragic incident and offer support to those who need it."
Mr Alaneme, 18, who was also known as Christian Roberts, died after being knifed last Friday night.
A 29-year-old white man who has not been identified was also stabbed during the incident and is stable in hospital with non-life threatening injuries
The road checks and witness appeals will run from 2200 BST on Friday until 0300 BST on Saturday and again on Saturday night into the early hours of Sunday morning.