Tributes and messages are also being placed on internet sites, but some of what has been written prompted police to warn people against breaking the law.
Bunches of flowers and other tributes, along with messages chalked on the footpath, have appeared in Exe St, near the intersection with Thames St, where William Peter Lewis (16) died from knife wounds about 10pm, despite attempts by emergency services to revive him.
A 16-year-old Oamaru youth was charged in the Oamaru Youth Court on Saturday afternoon with William's murder.
The defendant was remanded under the Children, Young Persons and their Families Act without plea in custody to a youth justice residential centre in Palmerston North and to appear in the Palmerston North Youth Court on Friday.
Police had Exe St cordoned off until about 5.30pm on Saturday and, since then, the flowers and messages started to appear, along with empty bottles and containers from a fast-food outlet.
Some of the messages included "R.I.P.William", "Stay blue and true to your own crew" and "Love [in the shape of a heart] you bro"There was also part of a 2Pac song - "how many brothers fell victim to the street, rest in peace".
Police are now waiting for forensic tests to be completed on a knife "of interest to the investigation" recovered in the area late on Saturday.
Further information was unlikely to be available for a few days.
In the meantime, the investigation team, which numbered about 30 at its peak, has been scaled down to give a break for some officers involved since it started.
Police are not ruling out that other knives of interest may exist and have asked people in the Exe-Thames Sts and sea front areas of Oamaru to contact them if they recall or locate anything of interest.
William's family, of Timaru, has requested privacy, although some of his extended family and his friends have posted tributes and messages on internet pages.
Some Oamaru teenagers posted information on social networking sites, including information suppressed by the court.
Detective Sergeant Mike Ryder, of Oamaru, yesterday warned people who posted comments about happenings in the youth court were breaking the law.
William Lewis had left Waitaki Boys' High School and was living in Oamaru and commuting to Kurow, where he hoped to become an apprentice mechanic.
