The five NW's are a variation of the five W's:
What? Where? When? Why? and Who?
The five NW's
Nigga Who? Nigga What? Nigga Where? Nigga When? Nigga Why?
"We gon need ta solve dis crime 4 realz usin da five NW's nigga,'
"Nigga Who?" Who was involved?
"Nigga What?" What happened (what's the story)?
"Nigga Where?" Where did it take place?
"Nigga When?" When did it take place?
"Nigga Why?" Why did it happen?