If you're not sure about the police in your locality try to find one that you can trust and talk to them but do it, don't let it go or you won't be the only victim and as the report says you might be a victim again.
International Level: New Activist / Political Participation: 17 1.7%
This is common core stuff. If you get mugged or robbed and do not report it the person or persons that did it will think you are a "Soft" target and will seek you out again and again since you did not tell on them. They will also feel that they can find and do the same things to others thinking that since they got away with it before then they can do it again and again.
Reporting any crime no matter how small or insignificant can make you less of a target and safer in the long run. It can also save others from being a victim. It also allows the police to track crimes in the area and see if a pattern is forming allowing them to find the individual or persons responsible and put them in jail.