How to Find a Route Witness to a Murder Case

There were at least 12 witnesses who'd given statements about seeing Curtis flowers walking on the day of the murders. The first statement from a route witness, naming Curtis, didn't come until a month after the murders. This seemed strange to me because what the witnesses were describing seemed totally unremarkable. I couldn't see any reason why anyone would have connected that to an execution style quadruple murder in a different part of town. And even if you did remember it, why would you wait so long to tell the cops?