Key points are not available for this paper at this time.
Douglas A. Smith, Christy A. Visher, Laura A. Davidson, Equity and Discretionary Justice: The Influence of Race on Police Arrest Decisions, The Journal of Criminal Law and Criminology (1973-), Vol. 75, No. 1 (Spring, 1984), pp. 234-249
Smith et al. (Sun,) studied this question.