Lawsiah's father, Lawrence Blake, had also died in a road accident at age 24.
"He was one of those kids that shines. When you're with him, he makes you smile, he makes you laugh, and sometimes you didn't really see all the pain he was going through in his own personal world," Ronald Karaitiana told Stuff.
"He was one of those kids that could sing a song, could tell a joke, and was fearless in the sense of coming forward in times like these, to make things light."
Ronald Karaitiana told Stuff that Lawziah's partner Jenna was "absolutely devastated",
Police said they were trying to put together Lawsiah's movements the night before he died and to figure out what happened.
"The most important thing for us is to get this boy back home so that we can grieve and move him on to his final resting place," Karaitiana told Stuff.
The road was closed for more than six hours and reopened at 12.30pm, after the police's serious crash unit completed their investigation.