Officers and Explorer Scouts went door to door in the Crescent Park housing complex Thursday. They handed out a letter from Police Chief Chris Magnus, asking residents to call police if they knew anything about the shootings.
Police say the first 48 hours are so important for investigators.
"As time goes on people begin to get back to life as normal and they aren't willing to come forward," Lieutenant Mark Gagan said.
Four people in a parked car were shot in a cul de sac early Wednesday morning. One died. The others were wounded, one critically.
Police say at least two gunmen armed with assault weapons fired more than 100 rounds, hitting the car, other parked vehicles and apartment walls and windows.
"It lasted like 30 minutes," Tracey Green said. Green lives in the cul de sac.
Green and his neighbors read the letter. They gave police credit for trying to get people to come forward, but the fear of retaliation is still very much on the minds of those who lived through the gunfire.
"Obviously, you can see what kind of firepower they got so don't nobody want to deal with that," Green said.
So, will the police chief's plea do any good?
"It'd be tough for me because, I ain't no snitch, like that, man," resident Kenny Johnson said.
Marvin Hayes says he is at the age where he is too old to be scared.
"Would I call the police; you know what, I'm so fed up now, yeah I would," Hayes said.
Police will continue to distribute the letter through next week.
People with information are encouraged to call 510-232 TIPS.