Best place to go = Google
Thank you

Topic too wide/broad.
First try and limit the scope, then do an operational definition of concept.
You will need to visit the Police Public Relations Officer in your state or Abuja.
Speak with some NGOs working on crime reduction/prevention, then you can start writing your paper.

You are free to get across to me, if you need for support

amos47:
TOPIC: Sensitizing the Nigeria Police Force las law enforcement agency for optimal reduction of crime rate.
Your contribution is highly appreciated

write out your background to the study

In the background to the study you can search the internet on researches about security,crime and policing or law enforcement.
It might not be easy to see a ready made research but if you put two and two together you will arrive at your destination
After background to the study you will outline the statement of the problem
researches are always seen as write ups to proffer solutions to problems,here you will convince your supervisor why the topic is a problem and how to solve it.
Good luck friend!