I checked the police report (below).  Officer Tim Smith arrived in the gated community around 19:17.  However, he did not leave his patrol car until after the shoots were heard and he received multiple reports.  He would not have arrived at the shooting until sometime after 7:18.  I propose to note his arrival at 19:18+. http://www.wagist.com/wp-content/uploads/2012/04/Twin-Lakes-Shooting-Initial-Report.pdf     