We now know the shooting, including the Wong-ending bullet, was over in 2-3 minutes....
Of course, my statement assumes you are not in a "GUN FREE ZONE" or a "NO CCW PERMIT" situation. When that is so, then the burden should fall upon the government for criminal liability keeping people from defending themselves as guaranteed in the 2nd amendment. Suit should be initiated and people should be paid handsomely for their loss CAUSED by the government not protecting them, as is assumed if they are not allowed to protect themselves.
PS: Goodyear Tire stores are all "Gun Free Zones" ... safer to buy your tires elsewhere.
When seconds matter...the police will be there in minutes. Wong had his plan set in motion the moment he barricaded the back door with his car. He knew the building layout as a frequent visitor for language classes. He knew where to find lots of victims quickly. He wore body armor in anticipation of some resistance. It is reported that he killed himself when the first siren was heard. It was also reported that he spent lots of time at the range prior to the incident. His shooting skills were well polished.