At the time of the shooting, there was one eyewitness besides the involved parties. The eyewitness was a well-known fellow gang member. When the investigation was completed, the witness's age and street name were recorded on the police reports. All the local cops at the time knew where this guy lived and hung out. The problem is that most of those law enforcers have since retired, transferred or quit, and somebody has to try to find him with just an age and possible address, making the case more difficult to prosecute.
Getting Basic Information
Go back to the basics, even if you personally know the witness. Collect all the identifiers, including date of birth, complete name, driver's license number, social security number, home telephone number, work address and telephone number. If you think the witness might move, get the complete names, addresses and telephone numbers of parents and siblings. If there is a language barrier, don't be afraid to ask the witness to write it down for you.
The follow-up investigators and the prosecuting attorney will appreciate your efforts. Subpoenas are issued and often mailed directly to the witnesses: therefore, proper zip codes are needed. If they are not on the initial report, someone else will have to find them.
Full names are used to properly identify suspects and witnesses. Just look in the phone book and see how many times Gonzales, Nguyen and Smith show up. The bottom line is that recording all the right information properly helps follow-up investigators and prosecutors. You know by now that many of these cases do not go to trial for a year or two, even if an arrest is made quickly.