Second City Cop had the over/under at 9 for the holiday weekend (but there’s still over a dozen hours to go, with most of them likely 90+ degrees!)
The best source for the final tally will be the Hey Jackass site (linked at SSC).
I have 65 total shootings as the over/under, don't think it's going to get that high however I think 9 murders is going to be a tad low by the end of the day today. I'm thinking more along the lines of an even dozen.
The day is yet young ...