No. I know that locally we've been fighting to get some data standards for how we capture disaggregated race-based data. If we think about the entry points for data, these are typically with police or corrections, so I think we're missing an entire segment by not having people self-identify at the courthouse or having some accountability by having lawyers give clients the opportunity to self-identify.
With respect to the use of police discretion for warnings or referrals to restorative justice, I can't say that I've seen much research on it either.