Well that thought would be wrong and you could easily validate this for yourself if you weren't already biased against Black people.
How did you get that way? By letting other biased people tell you these things instead of investigating them for yourself? Because had you done that you may have discovered this and a myriad of other similar cases:
For Years, New Jersey State Police Knew About Data Showing Adverse Treatment of Minority Motorists – Yet Failed to Act
This is just one case among millions.
Think! Why is it important for you and for others to BELIEVE that Black people commit more crime or behave more suspiciously than others?