A quick and incomplete list for some research I'm doing on the use of law enforcement (often called School Resource Officers) in schools. From what I have seen (and if I'm wrong here, please set me straight in the comments and I'll update the post) districts don't track the use of SROs in discipline for behavior referrals for minor offenses in any uniform way, if at all.
If this is accurate, we have a population of students who face out of school suspension for minor offenses, combined with a referral to law enforcement for the same offense - and we have no information about the number of students affected by this practice.
As a side note, in the 19 states that still allow corporal punishment, there are districts where SROs or local law enforcement deliver the beatings. Again, I have not seen any data quantifying how widespread this practice is.