It's out of date now but 100 facts and one lie about blacks is good....
http://www.duke.org/library/race/african101facts.html
Some suggestions....
Mention rape statistics especially BLACK ON WHITE rape vs WHITE ON BLACK RAPE
Mention murder statistics especially BLACK ON WHITE vs WHITE ON BLACK
Don't say the word "violent crime" because the FBI has dumbed down the meaning of it to make it seem that whites commit more of them.
Use crime statistics from major US cities that are majority black vs those that are majority white.
General way to figure out a crime index for an area.
Take total population....
Blacks = 10 points
Hispanics = 4 points
Whites = 1 point
Add up numbers and divide by population, that will give you a crime index for the area.
Example.
Total population 50,000
Blacks 50% = 25,000 x 10 = 250,000 points
Whites 30% = 15,000 x 1 = 15,000 points
Hispanics 20% = 10,000 x 4 = 40,000 points
305,000 points divided by 50,000
Cknott crime index for a town like that would be 6.1
that means you are 6.1 times likely to be victimized by a crime than in a all white area.