The shooting was last Thursday, Thanksgiving, November 22, 2018.
11/22/2018 = 11+22+(2+0+1+8) = 44 (Shooting = 44)
He was arrested in Georgia.
Apparently it was arrested by US Marshals, on the day leaving 32-days left in the year.
In light of this shooting taking place on the anniversary of the JFK assassination, notice the additional gematria of the shooter's name.
307 is the 63rd prime; JFK was killed in '63; Freemason = 307 (Jewish)
Dallas, Texas = 118; Death = 118 (Jewish)
Don't forget JFK was the 35th President, and also the 44th term president.