Statistics of Crime rates of immigrants can be deceptive

How hard is it to find reliable, objective, and unbiased statistics of crime rates on the internet? That task can be much harder than you can imagine. Try googling up on "crime rates of immigrants" and you'll be inundated with bogus statistics from fraudulent right-wing organizations like Center for Immigration Studies and VDare, many of which Steve Sailer has connections.

Can someone show me some reliable statistics on immigrants and crime?